I must admit I am quite surprised of the quality of this thread.
Every single post contributed valuable ideas and proposal. Even if I might not agree I think everyone tought about what proposed.
So I tried to sum up here the main points that emerged all over the thread. I also included some sort of “proponent” even if the idea was shared or proposed by multiple users. This is why I didn’t link to a specific post.

So, here is the foor for thoughts that emerged on this thread

According to some of the readers of this thread, Bitcointalk is losing steam because of the following reasons:

• Lack of SEO. Bitcointalk.org results are buried in tha back pages [@NeuroticFish]
• Automated payment for posts on other platform[Citation needed] [@NeuroticFish]
• In the last 12 years, community spirit has changed since Satsohi created it: it’s no longer a transnational free spirits community, but some bunch of people looking at bitcoin as a “Get rich quick scheme. As opposed to a “don’t get poor slowly'' scheme. [@JetCash]
• Declining quality of posts [@ddmrddmr]
• Lack of mobile theme [@almost everyone]
• Hostility toward new members [@Daniel91]
• Staticness, or too slowly evolving forum experience [@CryptopreneurBrainboss]
• It’ a natural evolution of the userbase who moves on, not replenished by other members. [@dkbit98]
  the forum is dying - and perhaps that's deserved / inevitable. [@ AdolfinWolf]

As a newcomer to the community, I have also participated in the suggestions and imagination of a small partner built by the forum App;

• 1. When people start to move from the PC to the mobile phone, we are bound to make some changes. This change conforms to the intentions of the people, and builds an app with the original intention of maintaining high quality in the forum, and joins some groups. The group function allows users in various countries and regions to communicate effectively.
• 2. Set up some reward mechanisms for high-quality posts, so that everyone here is not only spiritually driven, but also rewarded.
• 3. Set up a group function so that everyone can learn and communicate effectively in this group. I have to say that the communication method 10 years ago should now be added with some diversified functions, and more young people have also joined in. The level of our life is increasing in all aspects, to meet some of our delays and misses due to timeliness. Your good ideas and good friends will be more beneficial to push the forum forward.
• 4. The app can be launched in stages and recruit volunteers from the Bitcoin community to participate in the development. I think only friends here can do what we want.
• 5. We come from different countries and regions. We need to overcome language barriers and expressions to get effective communication. I think a large number of partners have encountered the same problem.
• 6. Offline communication is also a very important link. It will be warmer than online communication. We can regularly send offline communication meetings so that friends who love Bitcoin can meet and interact, so that this group can be more powerful and affect More people join the cause of building the forum. Of course, my ideal is to be able to show up a Bitcoin tour of the Holy Land, where Bitcoin can be used to pay for anything, hotels, museums, convention centers, restaurants. . . .
• 7. This friend said very well @fillippone What is the biggest driving force and asset in the past 12 years: community. Regardless of whether it is a community giving back forum or a forum giving back to the community, what should we do to give full play to the power of the community.
• 8. Some boring sections of the community can be removed.

As a newcomer, I think I shouldn't talk so much, but I really love Bitcoin, love this place, and love the people here, so I'm sorry to say too much, please forgive me.


Suggestions:

• Mobile theme
• SEO Optimisation
• Strategic Targets in order to  push Bitcointalk as a reference “brand” for bitcoin (/crypto)information into the mind of newer generations further that it currently does.[@ddmrddmr]
• Revive altcoin Board to Attract more newbies primarily interested in quick profit to later convert them to bitcoin [@rikafip]
• I think there is the potential for a lot of discussion around things such The current structure of the altcoin section does a poor job at facilitating conversations around topics like smart contracts, stablecoins, ERC20 coins (and similar), and NFTs (this may be temporary).[@PrimeNumber7]
• Refine Evil Fee to avoid false positive.
  
• A system that has a means of punishing the offenders or disobedience, should have a means of rewarding the law abiding members. When there are no means of rewarding goodness, it will surely decline. [@KingsDen]
• Focus on branding and corporate advertising (@ChuckBuck, stripped of sarcasm). Necessary evil to keep Bitcointalk relevant and finance more money intellectually relevant part of the forum, I might add.

This is only what has surfaced until now. Feel free of course continuing proposing or discussing everything proposed so far.

I hope @theymos, even without commenting, is reading this.
We talked about and analysed all the forum weakness. But I am sure what is the biggest driving force and asset behind during these last 12 years: the community.