I think so too, since the introduction will be anything but organized. People asking if they can just move their workstation to home...

But currently MS Teams is working fine in central Europe (Ger). There also isn't any incident report in the Office 365 portal.

There are some interesting browser based soft-vpn solutions that could work for a large amount of users. They could connect to their individual workstation instead of some terminal server that never was meant to support more than 20 concurrent users.