Switching cable providers - worried

I am looking for a new residence and the area I am contemplating does not have Comcast, but it appears that Charter Spectrum is available. After doing some reading it sounds like I will need a Tuning Adapter. It was somewhat tricky getting the Comcast pairing to work; should I be worried about getting Charter working when the time comes? Charter does not appear to be very TiVo-friendly, going by their website.

I do not want to give up my Roamio WITH LIFETIME so moving where there is only satellite is out of the question! Even if I *do* want a pony.

Thanks for any comments or advice.