Why do so many ATS platforms charge extra for features that feel essential?

I've been researching ATS platforms recently, and I noticed something I wasn't expecting.

The basic plans often look reasonable until you realize things like advanced filtering, interview scheduling, custom hiring pipelines, or analytics are only available on higher tiers.

I understand companies need premium plans, but some of these features don't feel "premium." They feel like part of using an ATS.

It's made me rethink how hiring software should be priced, and it's influenced how I'm approaching the ATS I'm building.

Curious how recruiters and hiring managers here see it.

What feature do you think should never be locked behind a more expensive plan?