The few companies I've worked at, by 5 years the company either has sold up and everyone was replaced / let go, maybe a select few get to stay out of dozens - the vast majority lose out and were exploited or the company goes on a hiring spree and there aren't pay raises or bonuses because company growth is valued over employee satisfaction. Feels like you're talking about the exception rather than the rule or perhaps the tech industry 10+ years ago but certainly not today.