“No one listens in mono”
Unfortunately and very respectfully this is incorrect…
Sales of Bluetooth speakers and ‘home assistatnts’ which as far as i’m aware are all mono are through the roof now and have you never noticed the amount of younger people who predominately listen to music on one mobile phone speaker?
mono is very rapidly becoming the ‘new stereo’… over bluetooth…
…so in real terms mono mixing, at least for popular music, is as relevant now as it was in the 60’s and 70’s.