Ask HN: Do you have a plan for retirement?

Recently, it came to my attention that many younger and younger people in tech do not have any money put aside for retirement, which is a shame since its the best time to establish cash for compound interest to take effect. Most are still paying student debt, etc. My question is for those folks who have a plan, what's your retirement strategy? And do you think you will have enough money to retire someday? Any valuable advice?