Talk groups IDs would change...
I have not heard anything about Richland County moving all of their communications to digital mode, which is what I assume that you mean. If they were to change to digital talk groups they would have to upgrade all of their radios to either XTS/XTL 1500, 2500, or 5000s as well as reprogram all of their radios to digital talk groups.....As a result, all of their talk group IDs would change.
If they don't already have digital capable radios, it would cost them a lot of money to move to digital mode. Moving to digital is the right thing to do and almost any new system, including the new Palmetto system upgrades (i.e. Charleston County), will be digital only networks.
If I hear anything, you all will be the first to know!