I fully expect Twitter to become one of the big name tech failures, but not the only one. The tech bubble is starting to burst, and I wouldn't be surprised if there are some big name failures.
It will be interesting to see how things change, because there are lots of changes in general in the tech space.
A lot of people still
writing about tech, for example, are finding it hard to make a living - and unless the publisher can do more sponsored content, there just won't be the money to pay people to write.. and lots of people are giving up for other work. There's just no money in it anymore, and companies would prefer to bypass traditional press in favour of paying influencers to only say nice things about their product and/or service.
The way to get products is to buy them, not get review units, and that means you need income - and people don't want to pay for editorial, and advertisers are paying peanuts.
Then you have YouTubers. Some still making a ton of money if they're big enough, but many more finding the income to be dropping massively - and if they're making less money, will they still pay the likes of Adobe for the tools to create and edit the content? There's also the increased competition, given anyone can live stream amateurish content and get a following (albeit not really making any money) so, again, more people are considering giving up and getting a more secure job - whatever that might be.
People also get bored of watching the same type of video over and over, with all that professional high-grade production value stuff not being enough if the subject matter has gone stale.
For TV, you have multiple broadcasters launching streaming services and all wanting between £70-200 a year. That's not sustainable either. People are tightening their belts, so I doubt there's any room for so many platforms - some of which have very little content that makes it worthwhile subscribing.
Some cloud storage companies are reducing the free allowances or increasing the cost of storage, and maybe some people will just ditch it in favour of going back to using external hard drives and the like (people should in fact do both, but that's not for this thread).
I am sure I could go on for ages if I stopped to think of other examples, of which there are no doubt many.
As for Wimpy, my 'local' one (the one I grew up with) is still there and still run by the same family. I guess they got a good deal and never wanted to change, and the food is great. I guess when they retire and if the children or grandchildren don't want to be involved, it will probably close and become something else.