[Solved] - Tower's 1st [no, 3rd] Hard-Reset since clean-reinstall.

[Pliny.D.Elder]

Sounds like you know what your doing, and there's plenty of ram there.
You can run that command. No decorations or kwin effects will change.
Timeshift, ukuu, aptik, are all immensely useful tools. I have them installed.

Here's a good read...
https://sites.google.com/site/easylinuxtipsproject/ssd
/etc/cron.weekly/fstrim