There is an easy rule: good enough is always good enough. 41 year old developer here who worked on various projects going from solo to around 50 person teams.

There is an easy rule: good enough is always good enough. 41 year old developer here who worked on various projects going from solo to around 50 person teams. If you want to move fast, you have to hack stuff together. That is exactly what your CEO did. In the end it all depends on your project. If you make a game, let your users find the bugs. If you make life critical software, you better have some rigurous tests in place. A 1 person project can be really messy, but a 5 person project can't. Don't put effort into code that might be thrown away. Most things are an investment, so always question how fast you get the ROI. It's always a balancing act. But in the end, it always comes down to the same question: is it good enough? If yes, continue. If no, do the investment and move to the next level.