I think this was inevitable, considering the original TMCC was around since 1995, Legacy since 2007... I figured the components for the Cab2 were getting close to obsolescence. I'll hold out on the 'bridge' as long as my Legacy continues to work.
I surprised it took as long as it did to incorporate Bluetooth into the upper end Legacy products. I remember when Williams/Bachmann introduced Bluetooth control and thought why Lionel hadn't done something like that.