Modern web UI is nice, but at the end of the day when it comes to mobile, apps are still king.
If the purpose of this is to replace the interaction we had on Yammer, a mobile app is a necessity...
"We're happy with the way this new community reacts on a mobile web experience"
I really don't share this opinion and I'm not one of those users. The experience is far from good.
- Need to authenticate. I use several MSA and Office365 accounts with strong passwords and MFA. If you need to authenticate over and over again, that's a real downgrade to the experience.
- Notifications. Other notifactions options than email would be very welcome.
- But the most import of all, a good experience in viewing content. Now my thumb is sore when you go through a thread on a mobile device.