I guess I might phrase it something like, if you're going to make L5 it is probably the result of excessive competence. If that is you, you will get their faster cutting your teeth in at least a few different startups. Develop judgement and a variety of experiences.
If you are on a team of n<10 responsible for keeping a company/product alive you tend to learn a lot more than if you're on a team of n>1000.