Genuinely curious, what would the advantages be?

Also, what if the Linux distro does not have systemd?

Yes.

All my self hosted containers are bound to some volume (since they require reading settings or databases).

True.

But I assume OP was already running docker from that user, so they are comfortable with those permissions.

Maybe should have made it clearer. Added to my other post. Thanks!

You shouldn’t need sudo to run docker, just can create a docker group and add your user to it. This will give you the steps on how to run docker without sudo.

Edit: as pointed out below, please make sure that you’re comfortable with giving these permissions to the user you’re adding to the docker group.

For the littering part, just type crontab -e and add the following line:

@daily docker system prune -a -f

If you don’t want to fully host it yourself (which I think it’s wise), then it’s a good solution.

If privacy is important to you, ProtonMail has a good reputation, but I haven’t been keeping up with the latest developments in the area (there might be other providers that suit your needs / budget).

Do you mean buying your own domain, and forward email sent to it to an email provider?

A lot of email providers have that option (with paid plans). For example

https://proton.me/support/custom-domain

A lot of people thought this was the case for VMs and docker as well, and now it seems to be the norm.

Yes, but docker does provide features that are useful at the level of a hobbyist self-hosting a few services for personal use (e.g. reproducibility). I like using docker and ansible to set up my systems, as I can painlessly reproduce everything or migrate to a different VPS in a few minutes.

But kubernetes seems overkill. None of my services have enough traffic to justify replicas, I’m the only user.

Besides learning (which is a valid reason), I don’t see why one would bother setting it up at home. Unless there’s a very specific use-case I’m missing.

Seems a bit overkill for a personal use selfhosting set-up.

Personally, I don’t need anything that requires multiple replicas and loadbalencers.

Do people who have homelabs actually need them? Or is it just for learning?