Interestingly today is the 5th anniversary of Sony Sab HD. For many years, including all the TMKOC episodes before Ep. 2016, I had to watch this channel in SD. By the time HD launched I had to stop watching TV completely as I had to prepare for JEE.
I prefer HD channels over SD channels anytime as TV is HD what is use of it if we add DABBA SD channels.
There should be more HD channels, I have subscribed SD Channels like Sony Marathi, Shemaroo Marathibana, etc as they don't have HD feed but channels like Star Pravah, Zee Talkies, etc I subscribed in HD as they are better in HD then SD.