refreeze

If you have done a partial gene sequence for a service like ancestry or 23andme you can just look at the raw data and search for the known polymorphisms.

Methylated B vitamins and vitamin D were life changing discoveries. I have some polymorphisms (VDR and MTHFR) that mean I am less efficient at absorbing them from food. 2000 IU a day and a B-complex ended chronic depression/anxiety and insomnia for me. Those mutations are pretty common so I highly recommend trying them for anyone with similar issues.

Aside from that I think a whole foods plant based diet with some eggs and fish and no refined sugars is probably the way to go. Some micronutrients like vitamin A and K2 are more easily absorbed from animal sources, so eating a small amount of meat and/or eggs is probably a bit healthier than pure plant based IMO.

I quite like Fastmail. It's a bit expensive but the service is very reliable and they have a well established reputation. You can create masked emails using their domain or your own from the web interface.

If you don't need the GPIO then buy a small form factor office PC like a Dell Optiplex Micro or a Lenovo/HP equivalent. They cost about the same on the used market, are more performant without the ARM headache and use only marginally more power (maybe 5-10w more at idle).

Invidious?

You will hate Ansible if you are coming from Nix. I went the other way and Nix is 1000x cleaner.

Being able to actually reverse changes is trivial in Nix, but can be a headache in Ansible. Not to mention the advantages of writing in an actual language and not yaml full of template hacks. I personally don't see much future for tools like Ansible, there is considerable inertia working in its favor right now and it is absolutely true that it is widely used, but the future of configuration management is for sure more aligned with how Nix works.

Similar to my scheme:

laptop = "laptop"
nas = "nas"
router = "router"

Then if there are more than one in each category I use nas-0, nas-1, etc.

Bangle.js watch is probably the closest thing, but I'm not sure how good it is compared to Garmin.

I have used all three! I started with Server then went to CoreOS running Kubernetes and settled on NixOS which I have been very happy with for about a year now. I run about 25-30 services all using built in modules.

Regarding security, if you are using well crafted modules on NixOS, there should be good systemd hardening in place. That being said there is no reason you can't just use containers on NixOS.

I also find deploying NixOS far superior to butane/ignition used by CoreOS/Fedora. I use nixos-anywhere and can deploy my entire server in a few minutes without manual intervention.

I'm having some issues with my private instance that is used solely by myself and not even exposed to the internet.

I use it over Tailscale only and it works perfectly as an alternative.

I think it is a combination of the required precision, liquid ink vs solid filament and the difficulty of handing paper vs simply moving a print bed on a 3d printer.