I built 7 products until I had a product with product market fit with decent revenue. I could not solve the marketing / ads riddle yet. But I have about 25% revenue growth per month starting from a low level. Now I am making a 8th app. I started while I was working as an employee. Obviously I made more money. now I have way more time and flexibility which is a massive gain of freedom plus any potential revenue growth. Basically I exchanged employment risk with business risk which is fine for me.