KWin crashed and I cannot even report it?

Operating System: Fedora Linux 44 
KDE Plasma Version: 6.7.4 
KDE Frameworks Version: 6.29.0 
Qt Version: 6.11.1 
Kernel Version: 7.1.8-200.fc44.x86_64 (64-bit) 
Graphics Platform: Wayland 
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz 
Memory: 16 GiB of RAM (15.6 GiB usable) 
Graphics Processor: Quadro RTX 4000

Sounds like you did not reboot/logout since updating your system.
The crash might because you are running with a mix of old and new libraries in memory/disk.

What would be a reasonable amount of reboots of Fedora 44 KDE Plasme edition?

One, after an update.

Or perform an offline update, where the new software is installed as part of the reboot.