Should have been more specific as to which industry I was referring to regarding the resume comment.

I worked for a big bank for 5 years supporting large trading systems. After the 3rd attempt to retire a legacy trading system by rolling out a new system, someone pointed out that if you are a mid level manager you don't get any resume points for refactoring old systems.

Hence, you keep trying to roll out new systems even if those systems have bugs like "switch all buy orders to sells" (true story).