The Charter cluster in Fort Worth, Denton, and Cleburne went all-digital in 2013. Just last summer, my Time Warner Cable cluster went all digital, and we got digital adapters which are far cheaper than the set-top boxes.
With Time Warner Cable's lines far more advanced with faster internet and crystal clear digital picture, the rest of the aforementioned Charter cluster is gonna have to get with the program. From what I heard, they're still using old lines in some parts.