throwawayforob's comments

We're a company with a .net stack that is being acquired right now.

It didn't come up until their senior engineer said we should rewrite everything in Angular.js and Java. The tech management guys quickly said, "Sure, maybe, but for the foreseeable future, we will SSO between the two systems and plan for deeper integration later."

Hands on engineers care a lot about tech choices and sometimes have actual good reasons. At the business level, nobody cares as long as you can meet the business need.