Microsoft Teams Release Processes - Why do I not see a feature but my colleague does?

I no longer need to tell our handful of users (who were always patiently waiting for the same Ms Teams features as their colleagues have had for ages) “I’m sorry, but we are at the complete and utter mercy of Microsoft; our IT department have zero say and control as to what happens with MS-Teams and some of the other office products”. 

Why?

… the users now say… “we’ve given up on MS Teams, because it was far too unpredictable. -  We can’t work with a system that we have to guess if a feature works or not between our colleagues”. . 

Instead, our users have chosen the predictability and stability of Zoom and Slack. Yes, I understand that these come with a higher financial price tag, but at the end of the day when you’re running a business you want some level of predictability and stability.

It’s a real crying shame because personally I liked that MS Teams could offer the full UC experience, but who am I to argue with all of our user-base? After all, I’m a user too and I agree with them!