It's worth noting that achieving immortality isn't just about medical breakthroughs.
Even if one were to have "immortal" cells, an accident resulting in fatal physical trauma would likely occur within about 400 years [0].
Even if one were to have "immortal" cells, an accident resulting in fatal physical trauma would likely occur within about 400 years [0].
("In case of car crash, drop severed head in cryoliquid and take to hospital when convenient, preferably within 10 years")
In other words, immortal people would be less likely to base jump, fish beyond Arctic circle, drive without a 5 point seatbelt and helmet, etc. They would use simulators for kicks like these.