In my experience "one more feature" is usually a very polite way to say "no", and it can be a sign that you haven't identified the proper solution to their "hair-on-fire" problem yet.
(I've built the exact features prospects requested, and after showing the built feature I usually got another excuse, i.e. "I would also need feature y first", or "not right now", "no budget ATM",... )
If you nail the hair-on-fire problem people should be considering how to finance it or start asking "by when can we use it".
Having been a developer first, I also hugely underestimated the importance of a proper ICP, value proposition etc. Your messaging might be a big part of the reason that people are saying no or yes on the spot.
May everything work in your favor in 2023!