Just wanted to add my voice since I don't really post here anymore after migrating to reddit.

The Segwit2x fork has been agreed with the miners and still has massive support with > 95% of all blocks tagged as Segwit2x.

Only a small number of companies have explicitly said they will not support Segwit2x and mostly these are Blockstream owned or have caved in to pressure from the Twitter fake account NO2X campaign.

There are some companies the NO2X crowd are claiming as on their side when all they have done is express reservations about the lack of replay protection. Which frankly I don't think should be added, this isn't a fork to create a new coin. This is a fork to enforce an agreed protocol change. A form of replay protection has just been merged so it will be interesting what these companies say now.
Example : https://np.reddit.com/r/Bitcoin/comments/740son/nya_signer_uk_company_crypto_facilities_pulls/

The vast majority of all companies in the Bitcoin space have stayed silent and are sticking by long established statements that they will be following the "longest chain". That's the longest chain of whatever is agreed to be "Bitcoin" and in roughly 6 weeks time that may have 2Mb blocks.

Are all the core developers going to quit because of this ? No, they have jobs and careers established and most won't be going anywhere so they will just start working on an implementation which in compatible with Segwit2x and which also brings in the changes they want to see introduced. This could be the segwit2x code base or it could be a branch from the core code.

The minority of very very vocal developers who are against this may decide to leave the community but this may be because they have taken very strong stances which they don't feel they can back down from. If this is the case then I don't see this as a big loss. If you can't be pragmatic in a community project and accept "your" grand idea might not have made the final cut then the community is probably better off without you.

Certain people within the NO2X crowd (inc. developers) have talked about a change to the POW algo. or switching to Proof of Stake.  This is up to them but in my opinion this is an even bigger change than amending a blocksize cap and anything new implementation with those changes won't be Bitcoin.  With one or two exceptions I think this is a bluff anyway.

This is the first real test if the mining consensus designed into Bitcoin from the start will actually work and I can't help but think that Satoshi (whoever they are) are watching this on the edge of their seat with a big bucket of popcorn. That'd better be good popcorn because it's been really hard watching this drag on for so many years.

Patience though, not long now !