I still have the apps and account but never use them anymore.

I can report at least a 20% improvement in stress levels.

Facebook is way too overwhelming for me to use. Fortunately the parts that I need to use occasionally (birthdays and messages to acquaintances) can be achieved by spinoff apps (Events and Messenger)

I did the same and saw an 11% improvement in battery life by removing those two apps. I had relatively similar amounts of usage initially, but eventually reduced usage to more scheduled times 1-2x per day due to lack of notifications.

no, i did the same removing both apps when messenger took over my texts making my phone slow.