You're right, ofc. iirc Shield was good in 3e but not GREAT because it didn't scale, and it didn't stack with .. shields. In 5e all this stuff stacks, and bounded accuracy means it stays very relevant. Every front-liner in my games wants the Shield spell one way or another, though it's usually through a ring or ioun stone of spell storing.But this is well-known, isn't it. Spells that grant bonuses to hit or to AC remain relevant at all levels, because the scale remains the same. Whereas spells that inflict X dice of damage do not remain relevant at all levels, as the scale for meaningful hp damage changes.
The only version of D&D to have really tackled this issue is 4e D&D.
Monster gets a lucky hit on 23+ AC warrior? Not anymore, Shield!
