What is the point in an official upgrade if it is unsupported? Seems like a way to trick people into an upgrade so they can start nagging users to throw away their hardware and get a new computer.
So glad I don't have to worry about this bullshit on my 11+ year old computer that is perfectly fine running Linux without any major issue or lack of support.
While true and some will do it for that reason, I bet most do it simply because the friction to forking is so low.
Some might have an intention to work on it but then don't or might start looking at it in detail then give up or get to busy or lose interest.
Others might just click it to save it for later.
And don't forget all the people that click it by accident.
It's not like it is a big investment to click the button.