Mostly it's just cheaper due to lower staff and rent costs, and maybe more efficient logistics, and less travel time / search cost for customer.

I still like in person shopping though, when i can, just pay the premium to be able to see what I'm buying and poke it a few times to check the quality.

Agree about large car park based shopping centres though, they're shite.

It'd be nice to have town centre back and real markets. Drive out the infestation of fucking hipster food stalls charging over a tenner for lunch. But there just isn't the trade to support more than a few real market stalls in my town.