40 was stupidly high and rare and now it's still stupidly high but less rare and people very much still complain about it, 30 wasn't super rare my entire life and i still complain about anything over 25 lol.
Local weather doesn't mean much anyway, hottest 2 weeks on earth and where I live has been mostly pretty chill with 2 days that were actually hot (and those still only went to like 31). Pretty much the way i remember summer commonly being a while ago.
And just to be clear i am in no way trying to pretend climate change isn't real, it's real and we're all royally fucked, but 30° really isn't anything new and also saying "it was 40 degrees for a week" on its own doesn't really say more than "global warming can't be real it was -10 last week".
I'm confused too, self checkout is the best thing ever, no social interaction and pretty much equally fast, while allowing for more checkouts in the same amt of space. Though tbf only if done properly. One store here started having them like 10 years ago and there was like a 10% chance each item that you'd have to call over an employee bc the scale didn't work. Haven't had any problems with the ones i encountered recently.