This is a "What software do I use" version.
Computer stuff:
Purelymail for email hosting. I use their web client for 90% of the use cases, and aerc for the rest.
restic for backups.
Neovim, Kakoune, and Gram for editing text, be it note taking, writing code, or just messing up the commit history. There are no rules as to which editor I use for what. Additionally, for note talking, I also use my own collection of (unreleased) tools I've made to replace Obsidian (well, not the entire thing, but the features I've used in Obsidian).
Librewolf for browsing the web.
Signal for chitchatting with friends.
mpv (with some custom scripts) for all audio+video needs.
Mobile stuff:
Note: I basically hate everything about it (though "hate" might be a too strong of a word given how little I use it or think about it). I mostly use it for things like banking, maps, calling people, stuff like that, plus for the music on the go.
I use some random Samsung phone (A series?) with the lastest supported Android version... My usage is fairly light on most days, and it has a decent battery, so I usually get a good few days on a single charge.
Signal for chitchatting with friends.
Thunderbird for when I'm outside and I really need to check my e-mails.
Material Files for managing what little files I keep on the phone.
Chocola for listening to music.
Tha app is still a bit buggy, but it's fine.
FairScan for digitizing documents and analogue notes.
HeliBoard is my keyboard of choice.
Poet Assistant for dictionary and thesaurus on the go.
For everything else I use a default app. Used to be more picky about this, but I gave up.
E-reader:
I use a Kobo Clara BW. It ticks every box I have for an e-reader. If you can find it for cheap (on a sale or something) it is a great value/€.
I never use Kobo's own software, except for booting into KOReader. I enjoy this setup quite a bit. The installation is quite simple as well.