I don't know why, but over the past 2 years, Premiere Pro has been getting worse and worse at stability.
Now, every time I try to open a project, even with all resources on an SSD, Premiere is still laggy and, most of the time, would not even load a program or source monitor. Playback , even in HD, is impossible; now, every time I want to work on something, I have to delete all cache files just to get 30 minutes of less laggy workflow and then restart the whole process.
Then there are times when the media encoder or in-program premiere rendering would just stop for no reason and get stuck at a random point during the exporting and just stay there, with no warnings, no reports.
It cost a lot for your subscription. Fix the program.
My pc is i9 12900K with 3080 so don't say my pc is not enough.