I sure know my computer isn't trash, even though it's slow right now and sometimes I just feel like hammering it down, it's still a good working machine but it has it's bad moments too. About RNG, it depends.. RNG isn't really used that much nowadays, aside random item givers, and anything close to it. probably random pathfinding for npcs and so on. Games nowadays tend to be more thought before being built and sent to the public (normally). Plus the way the engine works too sometimes make a difference. Optimizing a game itself can be hard due to the logic behind the scripts and funcs inside. (But that's my personal opinion)