I've been copying text by selecting it and then pasting 
by clicking the middle mouse button.

It suddenly stopped working, with no announcement that I saw, when I 
updated from Fedora 43 to Fedora 44.  It was very frustrating.  That this 
was intentional is quite rude.

So, LTT (Linus Tech Tips) has 3 guys doing a "Linux Challenge, part 2", and they're really positive in their summary.

As tech guys without Linux experience, the mouse scroll wheel click caused some issues.

Time-stamped link to the topic (whole video is worth watching for their evaluation):

I Don't Think I Can Go Back To Windows...

Judging by the comments on the video, quite a few people struggled with scroll-wheel clicking causing paste instead of being a scroll gesture.