Zero. Last time I checked, between my wife and I we have just over 110 total shows set to record between all of the DVRs, every single one of them is in HD.
A few weeks ago my HR34 missed recording Murder In The First, and I accidently deleted it off my cable DVR (Thought I was deleting a different show). So I had to resort to On Demand, Yuk! DirecTV had the previous four episodes of it up and in HD, but did not have episode five up yet the Tuesday after it originally aired. Time Warner had episode five right away, but they didn’t have any episode of it in HD. I gave it until Thursday evening, still nothing on DirecTV, so I suffered through the SD playback on TWC. That is the first whole TV show I watched in SD in probably 6 or 7 years.
If I’m not able to catch him on SiriusXM, I will occasionally tune into Cam and Company for a truncated version of the show on Sportsman Channel, which I do not have in HD. But like I do with all radio shows that are simulcast on TV, I turn the TV off, and listen in the background while I’m doing something else.