That said, in our case, the switch away from monthly plans wasn't just about churn. We actually got shut down by GoDaddy due to phishing abuse [1], which forced us to rethink our approach. We've since added a flexible trial extension to avoid punishing genuine users, but I’m open to feedback and willing to change if enough people feel strongly.
That being said, I would not base my pricing too much on a few random comments on HN. These responses can be a good indication, but I'd frankly reach out to some of my trial sign-ups who didn't transition into a paying client as well as some of my actual customers to get their view on it. I think pricing is going to be especially tricky in the AI space since it's so new and there is so much competition.
Good luck though.