The login screen one is particularly ridiculous, because my Ubuntu machine takes about as long to wake up as my Windows, but it sensibly buffers the keypresses until it can insert them so I never mistype.

It's just glaringly obvious that nobody has bothered for even a second to think about how to solve the problem (or indeed, just copied the solution that already exists elsewhere).

The start menu on the other hand I gave up on several years ago. I don't know what's in it anymore, and I don't care, because nothing could be worth the >5s wait for it to open.