On some Stack Exchange sites, 30 characters might be enough to effectively answer a question. Is this same limit suitable for a topic like Home Improvement? Would it even be possible to increase the number of required characters, on a site-by-site basis? Are there any good answers in the system that are at or near 30 characters?
30 characters can be too much.
Sometimes "yes" is all the answer needed. When the question is a yes/no question, for instance.
I've seen a lot of question where the correct answer is "Sorry, that is impossible."
Which is hard to say in 30+ characters.
We can downvote or delete bad answers, no need to place arbitrary restrictions like 30 characters. It's really stupid to see sentences like "Adding some extra text to reach minimum character limit", which I have seen done.
Sometimes, yes. To wit:
The answer is more than 30 chars but it doesn't have to be.