I'm on the border. I got the M1 Pro because I needed to be running Parallels for one specific piece of Windows software while often sharing my screen (that caused my old Mac to beachball half the time). I don't have that use case anymore (although, in theory, it could come back - but probably not likely, and I could always just buy and remote into a cheap n100 box for that use case). We're also investigating AI at work, but I'm high enough up the chain at this point its unlikely to be my machine doing the heavy lifting; and because of that I probably don't need the Pro. But not sure M1 Pro -> regular M4 is actually a significant enough change to warrant an upgrade. But Apple is giving me $925 for the current machine on trade-in, so now seems to be a good time to make a trade.
Wife would certainly be happy if I held onto the M1 for another year or two.