Assumming armageddon, apocalypse, &/or collapse of any form >doesn't< happen, at least another 50 years for neural translation to an inorganic medium &/or stem cell, nanite, whatever based biological immortality. Backups & copies as well. So even if a full dive simulator isn't developed for another 200 years, it won't matter as long as you got your way into one of those options.

Even minor extensions expand the chances of lasting long enough for that chain reaction to occur.

I'd opt for hybrid (cyborg with original brain in nutrio tank) if possible as a through way. That covers philosophical arguments that "copies aren't really you", & gives science &/or supernature time to prove it partially, if not fully wrong.