When can we expect the 'mid-split' upgrade in Southern Arizona?

Hello, We recently had a maintenance related Comcast outage in our area (Tucson Az, 85718). Curious, I checked my modem connection stats and noticed that the downstream channel frequency range was extended on both the upper and lower ends. However, the upstream channel frequency range was still at 5 - 45 MHz which is considered the low-split or sub-split frequency range.

Does Comcast know when they are planning to rollout the mid-split phase of DOCSIS 3.1 in my area?

Thanks,

Darren