What are these obsolete checkpoints you keep mentioning? Those things in old arcade racing games? You know, these healthpoints in so many games serve the same purpose of a life-inventory, allowing players to fuckup without losing.
Quicksaving is also getting old. Respawning without the old weapons and powerups of one’s previous life is starting to age, too. The next step, logically, is players seizing control of adjacent friendly NPCs when they die.
The ultimate unquestionable alternative is saveless, checkless, spawnless full-playthrough one-life mortality.