[dilyevsky]

If it’s a saas then original mvp will take anywhere from 6mo to 2y then it either dies or scales in which case it’ll be nearly rebuilt again with a much larger team this time. Therefore you will not learn anything on year 4 that you didn’t already learn in year 3

[spiffytech]

As a data point, I've worked at several companies powered by software they'd begun writing ~8–20 years earlier. No rewrites.

These projects were the cornerstones of businesses sized from a couple dozen to a few hundred employees.