Before the "no save system" hysteria sets in, let's give the game a fair chance.
I mean, in all honesty, not all games need save systems. The best example would be
Monstrum.
Some games are designed for quick sessions, not longer that 2-3 hours. If you can organise that amount of time for yourself there is no real need for saving the game. It would possibly take away a lot from the experience of a randomised, threat-ridden survival.
That's theory of course, since I have not tried Tin Can yet, and can't say, if this is really that sort of game, but it sure looks like it. While generally I hate games that don't include any kind of logical saving mechanics and therefore waste your time (like the abysmal thing they did with Kingdom Come: Deliverence when it first came out), I genuinely understand, that in some games saving could de detrimental to the experience, and would encourage exploitaition.
I'm really interested in Tin Can, have wishlisted it a long time ago nad hopefully soon will be able to try the game out :)