"Better late than never" is a phrase I heard a lot as a kid, and I still believe in it today.

Like most things, though, this doesn't really have a 'one size fits all' answer.

For example, if someone asks a question in your comments with some urgency for the answer (like how to treat some problem with their plants) they aren't going to want to wait.

Some people are all about rewards, so after 7 days, your post disappears to them.

Some people, like me, are happy to let you live your life, and know you don't owe us anything, so we're just happy if you reply at all, ever.