I speedrun games as a hobby :P we exploit a lot of bugs developers are unaware of lol. A lot of speed games are older though, so we’ve also had a long time to find some of the more obscure ones. Bug fixing is an ongoing process in modern games. I dont think it’s possible to have considered every single possible situation in a game engine, at least not for an average developer. But you sound more in the now about their internal processes, so you’re probably right and I misinterpreted what they meant by that quote.