Here's the smell test:
If I stop working on something and go to the shop, or to sleep, or say "It's 8pm on Friday, I can pick this back up on Monday", can I reliably walk away and have my stuff (apps, sessions, etc.) where I left it when I come back?
Not. A. Hope.
I've done all the regedit hacks, the group policy changes, the mouse jiggler, but it's never enough.
Your computer shouldn't fight you. Homeservers have uptimes measured in weeks or months, that's what I need my desktop to be like.