Ryan Helmer nothing is stored locally on the room system. The room system joins the meeting, everything is with that meeting object.
We specifically Certify complete solutions so we can assert quality across all the components and support the entire solution. However for rooms with existing AV equipment, our partners do also offer core systems / integrator kits, which are basically just the room system compute and touch console, such as the Crestron C160-T:
https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/across-devices/devices/product?deviceid=305
This system should connect to any AV equipment which can connect with USB, and those devices then should work, although since we have not Certified them we won't be able to support the AV equipment itself.
Note that we have now also Certified a variety of more advanced equipment such as DSPs, ceiling tile mics, etc.:
https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/across-devices/devices/category?devicetype=73&page=1&filterIds=