Has anyone here recently quit their job and become self employed? Any regrets?

Yes, recently, but no on regrets. For me, I set clear timelines / milestones, set up some consulting contracts, and mulled on it for a long time before taking the jump, which was helpful structure since leaving a job leaves you with a lot of ambiguity. I wouldn't call this a regret, but in hindsight, I would do more to expand my community with other founders and self-employed folks in advance. I'm doing that now, which is great, but at first it can feel isolating.