Comment by JimRoepcke

It is if you're using Safari. I have two M1 Max MBPs. My personal machine runs Chrome, and my work machine runs Safari. I can run my work machine for well over a day doing iOS development in Xcode with an external monitor attached and not run out of battery. The personal machine will last almost all day (without a monitor attached) but not quite. I'm sure if I used Safari it would last much longer.