What's your advice for a accumulating 2-3 million by the time you are ready to retire? That's my number because I want to 'retire' from regular, year round employment when I am 55. And I still want to be able to afford healthcare, a nice meal out and few weeks vacation somewhere fun. Your number may be different though cause individual taste vary. That number is roughly what my wife and I will need if we want to informally exit the workforce in out mid-fifties.
It seems like the point that is being missed is this: if you want a comfortable retirement you need a plan/strategy and you need to reliably, consistently execute on it. The earlier you start to do this the better. The author offers an opinion for something that would have worked for them. Ymmv but if you think you will just wake up with the means to 'retire' and move onto a different phase in your life when the world moves on and the ecosystem changes without planning, executing and routinely re-evaluations your progress, please re-consider.