I have heard stuff along the same line, it has been a fairly tight lipped deal, They weren't necessarily going to abandon the VHF, but they aren't going to maintain it after a year or two. They also plan to interface a gateway between the two, so in theory if the SoCo doesn't work the VHF will, and vise versa.
I was told no to BeON, strictly SoCo's MCPTT app running on the XL's, no multi-sim, essentially the same as what they are using on the sonim devices. (a lot of troopers have mentioned that in our region the SoCo service was terrible)
However I am glad to see a large agency stepping up and embracing new technology (considering Georgia can't afford to build out a statewide trunking network, and the 100+ conventional VHF repeaters throughout the state being a fiasco at best) and possibly abandoning a LMR system completely. This could be a large feather in the cap for SoCo, and could lead smaller agencies to follow suit. I have also heard rumors that AHP will be watching this closely.
Some of the Game Wardens already have the XL portables out in the wild (pun intended) as of a couple weeks ago.