When their plus bikes first came out, Specialized said they found not much detriment with the 30mm rims, and specced them across the board for weight savings.
So no, you won’t die.
Two things you would expect to be less good than with wider rims:
Rounder shape vs a flatter shape. This means cornering knobs come into play later, and any channel between center and corner knobs will be much more pronounced.
You might want to pick a tire with intermediate knobs, like a Rocket Ron, Vigilante Purgatory, Eliminator, new Nobby Nic or Hans Dampf vs something like a Minion, Magic Mary or Butcher.
The second thing would be less sidewall support at lower pressures.
Less of an issue in back, where you need higher pressures to prevent rim strikes, and a bit of squirm isn’t a big deal.
You can choose tires with stronger casings and/or run an insert like Cushcore-Plus. This will help stabilize the sidewall and prevent burping.
Both of these things also depend on your terrain and riding style. For easy cruising/bikepacking, where you are not cornering super hard, none of these matter.
For bikepark shredding, it would be a very poor choice. Go 2.6” instead.
