I was also going to say "not rare" but decided, I don't really know what "rare" might mean in this context.
Looking at my paragon level home game, there a total of zero PC's with any kind of bonus to death saving throws. The only kind of bonus I can think of (for any kind of save) is the dwarf's +5 vs poison.
In a paragon LFR group I'm playing in, I'm stacking the horrid cube and resilient focus for +4 to all saves, and I'm not the only one, so save bonuses seem like pretty common place.
In an epic game with a paladin that has Hero's Poise that gives everyone a +8 or +9 to saves, saving throws can become trivial to pass.
Looking at my paragon level home game, there a total of zero PC's with any kind of bonus to death saving throws. The only kind of bonus I can think of (for any kind of save) is the dwarf's +5 vs poison.
In a paragon LFR group I'm playing in, I'm stacking the horrid cube and resilient focus for +4 to all saves, and I'm not the only one, so save bonuses seem like pretty common place.
In an epic game with a paladin that has Hero's Poise that gives everyone a +8 or +9 to saves, saving throws can become trivial to pass.