I've created 3 products thus far. One is abandoned as failed. One is currently flirting with profitability with about 30 paying customers, there is definitely a positive market signal here, and I'm trying to take it to the next level. The other is an MVP, but it is apparently still missing bits to give it a real go in the market, so it needs more investment. All of my products are B2C.
I've also been working at small businesses for years and have built several products that are not mine. Mostly MVPs style products, but also some more ambitious projects. Mostly I've been the solo dev, but occasionally I run a team. These have also been, largely, marketplace failures. Some have seen success.
I've been really living and working micro-saas for about 3-4 years as both founder and dev. I feel like I've trained my instincts correctly. I WILL make this work, even if I have to build #4, #5, and #6.