The main advantage of a monoblock is that it does not share power supply and grounding circuits with the other channel. This can result in better bass, lower distortion (greater transparency), less crosstalk (more imaging information).
I run long interconnects and I have a balanced line system, so the interconnects are inexpensive (and 25 feet long). OTOH I keep my speaker cables as short as possible, as that allows a tube amp more definition and better bass delivery; something that is a lot harder with a stereo amp.
Monoblocks rarely draw more power, nor do they make more heat if they are the same power and class of operation as an equivalent stereo amp.
I run long interconnects and I have a balanced line system, so the interconnects are inexpensive (and 25 feet long). OTOH I keep my speaker cables as short as possible, as that allows a tube amp more definition and better bass delivery; something that is a lot harder with a stereo amp.
Monoblocks rarely draw more power, nor do they make more heat if they are the same power and class of operation as an equivalent stereo amp.