If you want to play modern or even recent games and indulge your locked down metwork desires I recommend getting a secondary PC just for gaming and run a separate vlan to fully separate traffic from your existing setup. There’s really no realistic threat vector there barring a state level actor or something equally serious but I’m happy to be corrected.

I had a similar issue and it was due to a typo in my Timezone field for Compose

The next pi I get will be turned into an MT32-Pi for use with my Mister retro setup and classic PC games.

https://github.com/dwhinham/mt32-pi

It can also be used as a midi synth if you’re into that

Use Quality Profiles and default to a lower quality. You can set the profile for each item when adding it, or change it after the fact.

https://trash-guides.info/Radarr/radarr-setup-quality-profiles/

My laser printer being on the same circuit causes my UPS to trip unexpectedly even though they aren’t connected. I’ve had to move it to another breaker.