I'm not convinced living in the US that all the financial planning algs that big finance institutions are using and going to hold up in the future, and curious how it works for a whole generation. But time will tell. So far the cycle always corrects itself. I'm especially curious how it works when there's going to be a lot more early to mid-50s employees being forced into retirement, who are going to be living a long time, yet.
I'm especially paranoid about my prospects of retirement if the market dives 50%. It's happened in the past, and plenty of old hacker news articles about how it really screwed up people's retirement plans. Look back at Stock market returns for some tech companies from 2000 - 2014. That's a big span to fill.... ( I think I read somewhere that the market return for 2000 - 2010 was just over 1% year, someone should fact check that, though).