I assume these places will stop taking cards (or impose minimums or surcharges) as soon as the pandemic is sufficiently past, since merchant fees are a significant cost at their cheap prices and low margins. I would usually pay that kind of place in cash especially if I am not buying a large order, unless I don’t have the cash at the moment. But I usually carry cash just like before the pandemic. For things like Starbucks, of course they can eat the card fees no problem so I’d even buy a snack or a flavored water with a card from them.

I try to exclusively pay in cash and a few places I regularly go to only take cash. It's cheaper that way

Are you from Sweden? for dollar pizza almost everybody pays cash unless you're a freak who holds everybody up with a card for a one or two buck purchase.

They’re still made and still legal, though because the demand isn’t that high they don’t make a huge quantity. You can get some from your bank upon request, though if they don’t have any on hand you may need to wait for them to get some on your behalf. The main thing needed for $2 bills is popularizing them.

$1 and $2 coins would also be a good idea, honestly, entirely replacing the corresponding bills, like Canada and the eurozone have done, and also eliminating physical pennies like Canada and certain euro countries. But those are harder fights. ($1 coins do already exist, in small quantities, alongside the $1 bill.)