I think you are spot on.

I did an RCN to Comcast swap on Monday. Client uses DISH network as her primary TV source but her building provides free cable to all units so she has it as a back up for when the weather is bad.

System is about 10 years old now so its distributed component. First hurdle was getting the comcast guy to find me an older box with component outputs. Second hurdle was convincing him that there is only one cable outlet in the entire house and that its a home run from the rack to the cable can in the hallway. He kept saying things like "are you sure" "some houses have the cable wires hidden so maybe you dont know about it". I was here when the wire was pulled so i think i am pretty sure. 3rd hurdle was the 20 year old slide out rack that i hate, Luckily i was able to do the swap without moving it.

Then it came time to update programming. The new remote had so many additional buttons...remotes are RTI and processor is crestron...so i decided to go home and schedule another day to upload the changes. This was an old system builder system that was bugging out when i tried to edit the UI files. I finally found an old laptop that i was able to use...with old crestron software that worked. Then i had to update the RTI file for each of the remotes.

Changing from RCN to Comcast turns out to be 3 hours of babysitting (between 1 and 2 and they showed up at 2:00) and 2 hours of programming with 2 truck rolls.