In case you are unsure what the sibling means: Debian is primarily a server OS (one of the best). When people talk about Debian, they mostly think about server use.
(That's why your question sounds like a joke :) Or maybe it was a joke?)
(That's why your question sounds like a joke :) Or maybe it was a joke?)
I’ve used Ubuntu since the 2000s and never really branched out to explore different distros. I’ve added LWN’s Distributions List [1] to my reading list to lessen my ignorance.