If they do that, nearly no one will find it, though. Are there larger non-federating servers?

I think the problem with this approach - read: the reason I don’t do this - is that you’re blocking communities from ever appearing again, and if your interests change, you still won’t see them. I think this is more likely to result in creating an echo chamber.
What I do is subscribe to communities that I found interesting, and then scroll all once in a while to see if there’s something else I like

I’m mostly reading my subscribed feed, and sometimes switch to all and if I find an interesting community, I subscribe to it too. The only communities I have blocked are either porn related or operating in a foreign language, which I see even though havening set my language preferences.

Afaik that’s docker’s fault. They always mark the latest uploaded image as latest. But also I thought it’s well known that :latest shouldn’t be used for any kind of software, unless you are a developer

I think provider might be a better world. It’s less of a technical term, and everyone knows what’s the difference between mobile service providers, internet/cable TV providers, and such.

I very rarely use reddit on PC, even though I use a PC for almost everything I can.

The reddit client that I was using kept track of which comments after new ones, but even that did not tell me that there are new comments there that I may want to read.

That’s right, but mostly it has been the same on Reddit for my while I was using that.
That’s not an excuse to keep it that way, of course, I would love it if we could subscribe to replies of a comment, either recursively or only to direct responses.

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It does with a plugin, but there are other tools that I think are not available for IntelliJ