DVRs should have a rule where if you’re already watching something when a new scheduled recording comes on and it doesn’t have enough tuners to go around, it asks you which program you want to go with instead of just chucking whatever you were currently on in favor of the scheduled recording.
This message brought to you because my stupid DVR just dropped the last half of the program I was watching because a rerun of Good Eats came on, and of course, I can’t just switch back because I was watching it in buffer and the buffer disappeared the second the channel changed.