While MacOS does seem to rearrange windows occasionally for no clear reason, and there have been serious bugs in past releases, it does correctly restore my win

While MacOS does seem to rearrange windows occasionally for no clear reason, and there have been serious bugs in past releases, it does correctly restore my window positions across two 4k external displays when I connect them through a Thunderbolt 4 docking station. Maybe some applications have custom window position management and fail at multiple displays? I haven't noticed any. The only third party tool that I use to help with window management is BetterSnapTool. It restores some basic missing functionality that comes built in in Windows, most importantly the ability to maximize windows and snap them to the left and right half of the screen, plus a few other things. FWIW I am by far at my most productive with a 43" 4K display in front of me with a sidecar 23" arranged vertically for long vertical documents. I do wish that 43" was an 8K to double the DPI though.