Having 3 or more identities often causes authentication to fail before it gets around to trying password authentication (or even all the possible keys). Recommend configuring the client to turn off PubkeyAuthentication by default (so that hosts that you don't have a key for will prompt for a password) and specify which key to use on the appropriate hosts using IdentityFile (might need to specifically turn PubkeyAuthentication back on, I don't remember how openssh handles having a default host block with specific host blocks)

You mean odometer, resetting the speedometer wouldn't be a bad thing.

Do you have any specific price/model recommendations?

The calibre content server also serves OPDS. Once you have a OPDS server in place you'll need to point a capable reader at it, but after that syncing and reading happens in the reader.

Typically xdg-ninja will tell you how to set things up so as many dot files and directories as possible end up in the correct xdg location instead of cluttering up the top level of your home directory.

self hosted alternatives for smart home and porn

How does self hosted porn even work and how am I the first person to notice that sitting there and mention it?

NetworkManager (network interface/connection management)

Pretty sure you mean systemd-networkd here. I find systemd-networkd to be very nice for headless systems, but NetworkManager seems to be a better fit for desktops because of the integrations it has available with KDE/Gnome/system tray

steamtinkerlaunch makes running Skyrim with ModOrganizer2 very simple. Other external programs will probably still be tricky though

I've always used this docker image to do pg upgrades. It runs pg_upgrade to recreate the system tables and copy the user tables (which normally don't have any storage changes). It does require that the database isn't running during the upgrade so you're going to have a bit of downtime. Make sure you redo any changes to any configuration files, especially pg_hba.conf

You can use https://isthereanydeal.com Make an account, go to settings, open up specials notifications and enable giveaways

Not sure if this fits what you're looking for, but FBReader (Android | Apple) on a mobile device is what I use. It can sync your personal books along with reading position and bookmarks using Google Drive and can access any OPDS catalog. It also supports most (DRM-free/unDRMed) formats

Relatedly, pretty sure most autotypers don't work. I know that keepassxc can't do autotype in wayland