+1 on OnlyOffice, it has 1:1 formatting compatibility with Microsoft Office. Unlike LibreOffice, it doesn't have to translate documents between odt and docx in the background.
In the same vein, OnlyOffice has poor compatibility with odt files etc.
Quite a few cars also still have a SIM card hidden somewhere, which can be removed. The location of it varies widely though and they're usually pretty hard to find.
I was very disappointed with the (default) Camera after switching to Graphene, luckily you can just download the Pixel Camera (including all the Pixel optimizations) from Play Store on Graphene OS or download it as an APK bundle from some other sites (downloading the normal APK won't work, it has to be the bundle).
This, I feel like even if you don't care about the environment, they're still way more fun to drive. (And "fuel" is a lot cheaper when driving sporty).
TVHeadend is the way, I've been running it with a USB satellite tuner for 5+ years. Setting it up can be a little confusing, but once it's running you pretty much never have to touch it again.
As for clients, there's a Jellyfin plugin, however it seems to not work for me right now.
My client of choice is Kodi with the TVHeadend plugin, and that works great. If you still want Jellyfin integration, you could just add your recordings folder as a library in Jellyfin.
Could I purchase two different brand drives and use them with btrfs?
I don't quite remember the source for this, but I believe I read some time ago that it's actually a good thing to have separate drives. The reasoning is, if you buy two identical drives (at the same time), the likelyhood of both drives failing around the same time is severely higher.
This is then amplified by the fact that rebuilding a RAID puts a lot of strain on the non-dead drive, so if ie. drive 1 dies and drive 2 is about to die, the strain you put on drive 2 in order to rebuild your RAID onto drive 3 might kill drive 2 before you even finish rebuilding your RAID.
Again, this is just from my memory, it might be worth doing some more research on.
It uses an ESP32-CAM module that actively reads your meter, using machine vision. The data is then published via MQTT. There are even some stl files for cases/mounts for common energy meters.
Once setup properly (with a 3D printed case from the provided stl files), I found it to work quite well. I have a pretty clean standard German water meter though.
I significantly prefer it for car navigation, it seems to always pick 'more sensible' routes than Organic Maps. Also the live traffic is very nice to have.
I prefer Organic Maps when I'm on foot, ie. walking through the city or hiking. Imo it feels less cluttered when you just want to look at a map.
Edit: Another big plus for Magic Earth is transit support. It's not as good as Google Maps, but it's certainly better than nothing.
While not FOSS, the closest thing we have to a drop-in replacement would be Magic Earth. It uses openstreetmap data, supports fully offline usage, has satellite images (only online though) and best of all, no tracking or telemetry.
I'd recommend spinning up a backrest docker container on your main NAS, which you can then use to backup to all kinds of sources. You could then for example expose a WebDav share on your second NAS, and setup automatic backups for there.
Even though this is the DeGoogling sub, you could also use Google Drive or OneDrive as a backup source, as backrest/restic fully encrypts all backups.
If the main battery isn't "meant to be replaced", it will often act as the CMOS battery (e.g. MacBooks have been doing this since roughly 2008).