It definitely reduces costs to swap 3 platform support to 2, but it still came as a kind of surprise to me. They (customer) poured years and seven digit figures into the web-based version which is now effectively going to be trashed. The current prod metrics are not supporting the 90% mobile thesis... I guess they just have high confidence that it will become true soon.
I'm wondering if these are the first signs of an age-based bias I have and the next generation just can't really imagine a majority of users using desktop PCs.