PleasantAura

Trillium is my personal choice for self-hosted notes. I haven't really had issues with using it on mobile, but I also just tend to put the stuff I think of when I'm out and about into a single note that I periodically go through and reorganize. It's been good to me so far, and it has all of the features I really need. If I need something fancier (or public-facing), I toss it in BookStack instead. Then again, I don't use either of them for business (mostly for tabletop RPG stuff and instructions to friends/family about using the other stuff I self-host), so if that's your application, I have no clue how it holds up.

You can use nginx or traefik as a reverse proxy locally without opening ports 80 and 443 to the world and host your own local DNS service that points to your server's IP (and even use a self signed certificate to get HTTPS working).

I dunno, OpenSUSE Tumbleweed and using mostly flatpacks for my apps have been pretty consistent for me lately, though that's the first rolling release distro I've tried.

I had about 16TB of total storage when it was using that much RAM. It still didn't like it.

Can confirm; this is exactly why I switched to Linux. After my fifth-ish reinstallation of Windows, Microsoft pushed an update that caused the OS to use 80-90% of my CPU and I couldn't fix it because they locked down the service that was doing it despite it being entirely unrelated to my use of the computer (it was an Edge-related service that scanned web traffic for "optimization" if I remember right - one of those where Microsoft says "it's necessary but we won't tell you what it is and it wasn't in the OS before a couple months ago").

Windows often uses 8GB at idle for me with a single browser window open due to how much background BS it runs that is entirely irrelevant to anything I use the PC for. I upgraded to 32GB, then just finally decided to switch to Linux for good because it uses around 4-5GB with 10+ programs open (and most of that is Steam and Discord being inefficient).

Vulkan is basically unsupported by nVidia on anything before the 20-series on Linux. My 1060 6GB can only manage around 4-5 FPS at 1080p in some games as a result while others work totally fine. In addition, the drivers aren't open source, so no one can go in and fix that problem.

The Vulkan vs DirectX thing isn't an absolute in terms of performance. In addition, it's worth keeping in mind that Windows is horrifically bloated with unoptimized "features" and can use up to 8GB of RAM at idle plus 10-50% of your CPU at idle depending on your configuration as well as which unnecessary services are bugged in that update. That in and of itself makes a huge difference; my W10 install was using 8GB of RAM and nearly 80% of my CPU on system services for almost a month straight before they finally fixed the bug and reduced it to 2-4 GB + maybe 15-25% depending on the day, meaning I was getting huge stutter playing games as simple as Old School RuneScape. My Tumbleweed install on my much worse specs-wise laptop, on the other hand, used effectively zero CPU and less than 1GB of RAM at idle (fairly confident on the RAM thing but I'd have to check for exact numbers).

Having played Halo CE for PC recently...no, it doesn't have split screen at all. That was only on the Xbox version (which is technically superior in quite a few ways). The only way to have split screen on Halo CE on PC is via console commands/mods. That said, I do agree with your overall point and I would love to be able to do split screen MCC on my PC without mods.

It's the cost of federation with instances that try to be giant general-purpose instances (.world and .ee, mostly): just constant shitty takes that overwhelm participants in the conversation. Federation works far better with lots of small purpose-driven instances instead of gigantic ones; my small (<1000 users) specific community-focused Mastodon instance sees absolutely nothing like this and is full of people who intentionally engage in good-faith conversation with the rest of the community while every large instance I've seen has the same issues as centralized social media in that regard.

Is there another alternative? Bandcamp is the only similar website that a lot of artists I enjoy use.

If you're watching movies with friends and want a FOSS alternative, Jellyfin is the way to go. It's basically a way to host a media streaming center that others can connect to. It might be a bit overkill depending on your needs, but it's great for that exact purpose. It doesn't have chat or anything, though, so you'll want to keep something else around for that.