The History Channel is the leading channel in my house, so to speak. Followed by Discovery.
I personally enjoy the "Classroom" shows on Hist and A&E. No interruptions by commercials. Plus, the last fifteen are always something different; usually a "Newsreel" thing. Also, if I get a chance, I do tune in to the "How it's made" show. Back in Germany, we had similar a show. Only difference was, their technology back then was less advanced. But even today, and at my age, HIM still does answer questions I had when I was a kid but never got answered.
Yes, THC has let go of numerous good shows. Bernstein was a cool guy and his stuff was very informative. The trailers for his new show on the Discovery Channel look promising!