Custom is usually bad, just takes longer to reveal the problems. Sometimes companies need to create custom things, the mistake is continuing to invest in them when a community project appears and doubling down for years until nobody in your org knows how it's done "normally" and nobody that you hire knows anything about your stack.
The amount of bugs I troubleshot in that tech stack was staggering just for basic day-to-day stuff.
promotion based engineering means an engineer shits something out that looks cool in a demo then bails to the next cool demo project while the rest of us are stuck with the reality of the turd.
