As a solo grumpy senior, I've been pumping out features over the past 6 months and am now expanding into new markets.

I've also eliminated some third party SaaS integrations by creating slimmer and better integrated services directly into my platform. Which is an example of using AI to bring some features in-house, not primarily to save money (generally not worth the effort if that's the goal), but because it's simply better integrated and less frustrating than dealing with crappy third-party APIs.