Proposal: Puppy Linux
If you want to prove this proposal is not a duplicate of the existing site (or contrary), post the example questions to Unix&Linux. If they get reasonable answers in reasonable time, this site is not needed. If they get no, or poor quality answers, it means U&L community doesn't provide reasonable help.
We had a similar situation with "Embedded Programming and Design". While theoretically with a big overlap of Electric Engineering and StackOverflow, it was proven needed - SO giving answers completely unsuitable for embedded, and EE declining to answer firmware questions despite its FAQ entry.