Discontinuation of support for Session Border Controllers in Exchange Online Unified Messaging

We're very disappointed in Microsoft with this move.  I think if there were some reasonable options moving forward, we could chalk it up to technical innovation.  Unfortunately, every single option for the 'small number of customers impacted' is expensive, time intensive and worst of all has little to no strategic advantage for the customer other than putting more $$$ in MS pockets.  The time frame also is unreasonably short.  We are very disappointed in the lack of options at this point.