With no pms you dealt directly with the boss and you managed your own tasks so you had a hard deadline and showed demos and once it was done support/training. It was waterfall so not finishing on time meant removing features or finishing early meant added additional features if you had time . Everything was prod. You needed to fix showstopper bugs/crashed but bugs could be harmless (spelling fr example) or situational and complex or show shoppers. You lived with them because bugs were part of the OS or programming language or memory driver experience at the time.