Resistance to nonmagic bps damage has been an issue for me from the start.
Back when I started out as a DM, I used the DMG rules to make monsters. Their advice was to halve the hit points of a creature with such resistances. So what happened? The one character with a magic weapon just destroyed the monster. It felt more like the monster was weaker for it.
So what then? Not give people magic weapons? That wasn’t fun at all. It felt like it was up to me as the DM to decide that someone dealt half damage, because I decided when someone got a magic weapon.
My hope is that with the more generous allocation of magic items, the HP calculations of monsters is brought in line better.