I think Gnome / GTK is a good example. Famously, the Budgie Desktop Environment will have to be rewritten on top of Enlightenment because they don't like the GTK 4 changes. So now they're forced to go to a different widget system. [1]

[1] https://joshuastrobl.com/2021/09/14/building-an-alternative-...

Your use of "forced" is interesting, because to me that doesn't sound like "force" at all, rather a "we don't like this thing so we're moving" which is a free choice for technical reasons.

Force to me is like what Amazon does with kindles. If it connects to the internet, it will update to the latest version whether you want it to or not. If you don't connect it to the internet, you can't use it.

Its a technical decision. Nobody is forcing them to do anything.

Sure, that's a good example of something else, but do you have any examples of any forced updates?