Are there any guidelines or suggestions regarding timelines on replying to posts?

Of course, we have a lot of threads in the various forums and I try to reply when I think I can be of support.

However, I sometimes hesitate if the thread isn't very recent. I don't want to bump an "old thread" and aggravate other members. However, a lot of the threads contain issues an OP is going through that don't resolve themselves right away.

Additionally, I think it can be supportive to "check in" with an OP to see how things are going. Perhaps a PM is more appropriate in this instance?

Any suggestions or guidelines I may have missed are appreciated! Thank you.