OK, I do understand. It makes sense now for me. I think there was an issue with me using my new client. I thought I was logged in and could not comment. Now I found out it was my fault. I was somehow logged out in the Thunder app.

btw. create to see that there are people here for interacting :)

Just like on reddit there was /r/technology and /r/tech... Which do you choose?

Choose the bigger one of course. That's all. On Lemmy they can have the same name but the search feature shows how many subscribers there are. It's pretty clear usually which to pick.

But everyone can see all of them and it's not a big deal if you post to a smaller community because a ton of Lemmy users look at the All feed so it will show up anyway.

Subscribe to all of them. It isn't an issue. In the next Lemmy version should have Multi community support too. Which should help solve things a little. (So then you can group them all into one).

Also with it on different domains, it means that there is a benefit for the longevity of the sysadmin (or any) community. As if one domain goes dark the others will work :)

Lemmy isn’t ready for a dedicated sysadmin community yet. It needs to reach critical mass in another community like technology first, much like how the sysadmin reddit community did.

The reddit sysadmin community is pretty great and i see no reason to abandon it.

Many (maybe most?) of us just use the all feed, and block the communities we don't want to see. That makes the specific community / instance a lot less important than reddit.

Welcome. Hope you enjoy your stay.