Incapacitation doesn't eliminate your movement or dis to dex saves, or gives adv on enemies to attack you... The creature makes a choice to keep the effect going by using its action on something else- which could be used casting a spell which is suddenly counterspelled... No save. If there was an effect that incapacitates them, the enemy can't use their action and they get zero saves from this spell.I'm not sure why Otto's doesn't just Incapacitate you and give you a save at the end of each round. Then it would be easier to directly compare what it's giving you. They must have thought that would be too good of an upgrade.
You need to just let it go, man.Neither is as effective as Elsa's Irritating Song.
Come on. Don't hold her back anymore.You need to just let it go, man.
And in one round that can be 7 or 8 saves, not counting the one they get on their turn.Tasha also gives a save with advantage every time the target takes damage, so if you attack them it's probably gonna run out pretty quickly.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.