“Don’t build a product that solves a temporary deficiency in the platform” —

Are there some examples to illustrate what you mean by temporary deficiency here?

One could also think that founders might want to build to fulfill an important deficiency in the current platform so that when the platform decides to address this deficiency, it could evaluate existing solutions built on top of the platform as a part of its build vs buy decisioning process, and potentially decide to go with the buy route.