pdvWireless (the company that built out TeamConnect) has sold the customer base over to Goosetown and A Beep but still operates the core radio infrastructure (see
pdvWireless Transfers MOTOTRBO Customers, Cuts 30% of Staff). Customers in Dallas and Houston specifically were sold to A Beep. A Beep also operates a nationwide Push-to-talk over LTE service called "Digi-Talk", and if I was to render a guess, they may be transitioning customers over to that platform.
Of course Push to Talk over LTE is the end of being able to monitor those users on a scanner.
pdvWireless (now called Anterix) is the leading company behind a push to reband the 900MHz band, much like was done in the 800MHz band a couple of decades ago to open up parts of the 900Mhz band for broadband wireless usage. If and when it happens, the TeamConnect system will likely be shut down. See
FCC approves Anterix proposal to transition 900 MHz LMR spectrum to LTE use – Urgent Comms
This 900MHz rebanding would also be impactful to the railroads and other services that exist in that band. On the upside, it might seal the fate of 3 of the 4 remaining OpenSky systems in Texas, as United Airlines might move their Houston OpenSky users over to their nationwide Connect Plus system, LCRA is already moving off their OpenSky to P25, and DART might jump to their P25 system (although only the Simulcast site would be affected so that might be wishful thinking). Oncor is also switching out their EDACS system in 900MHz, so they might avoid being impacted as well.