Man, I really don't know what you are doing here, since you are so unsatisfied with Bitcoin the way it is (currently zero issues with blocksize for non-spam transactions despite Hearndresen-FUD the system would break). Personally, I came to Bitcoin because it is a one-of-a-kind decentralized and secure store of wealth and transaction system without counterparty risk. Otherwise I would have been satisfied with Paypal.
It seems to me that you want "scaling" at any cost, even if there is no current demand and this means giving up decentralization. Also, you want to scale the dumb way by implementing extremist block size increases only, instead of using much more efficient second layer solutions. Therefore I don't think it's Bitcoin you want (as indicated by the message in the genesis block) - you want a Paypal 2.0.
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While there are some issues with the software itself like with every software, Bitcoin is fine with where it is now. There is nothing wrong with Bitcoin now. For the record, I'm not saying that I want a closed system for elitist or anything. Bitcoin does not have to be mainstream. In other words, if I were to chose between mainstream and decentralization I'd chose the second option. The only real reason for anyone to be pushing hard for solution designed for mainstream adoption right now, even though it damages decentralization, is profit.
Bitcoin Core is going to address scaleability (e.g. Lightning Network which is usually ignored by XT supporters; I wonder why) as necessary and will enable more people to use Bitcoin. This might not happen this year, or the next, but I still do not see the reason for which we should choose the risky path?
Where did you get the idea that Bitcoin needed to be adopted by mainstream to be successful in the first place?
It is already successful.