it’s based on the size of a codebase you feel comfortable managing. for me personally, due to my emotional regulation problems, it was also based on the point in time about 1000 hours in when I stopped getting really frustrated with a problem I couldn’t solve immediately. when i learned to accept the speed bumps as part of the process and started trusting myself that I would figure it out eventually. which gave me confidence and the ability to enter a flow state more sessions than not, which allowed me to be much more efficient with my time.