"a toolset that allows non- and minimally-technical employees to quickly and easily build new reports"

Been there, done that.

This is the mantra of the BI system marketing machine that I've never actually seen work in practice.

But I'm glad you've seen BI enterprise systems succeed where the end users are happy and feel their toolset is flexible enough for the new daily challenges they encounter (sincerely).

I love Tableau as an exploration tool and think the UX and visualization capabilities are awesome. Just not the solution end users wanted. I've also rolled out a massive cloud based enterprise BI system (data warehousing, ETL, etc.) at a separate company. That wasn't the solution, either. Plotly was. But, just my two cents.