I have noticed a few topics being locked, without any comments to actually explain why they've been locked. With both topics, it wasn't obvious why.
For example, one person was asking about a ISO for Apple Mac M1. I was about to point them in the right direction, then found that the topic had been locked.
I'm assuming an admin locked it, and I guess they had their reasons, but a quick comment explaining why topics are locked (when it's not obvious) would just help to create a friendlier atmosphere around here.