TBH this is a discussion companies are having internally. There are so many low/mid-tier SaaS systems people have bought because they need maybe one or two features from there. Maybe they're the only one that integrates with $vendor properly.

Now it's perfectly possible to do a "good enough" solution in-house for less than what we pay for the SaaS monthly. And as a bonus we own the full solution and can add any features we want without the SaaS provider gatekeeping it.