I used to own a business which dealt almost exclusively in cash. There are benefits, indeed there are pros and cons in most things.
I have however spent a fair amount of time in Norway this past few months where it is almost at the point of being cashless. The taxi driver seemed perplexed when I gave him cash on my first day there. He patiently explained that every driver had card facilities and that they would take card. Unlike for example Dubai where they all have card machines but mysteriously they never work
Restaurants and shops are the same. No matter what the amount. Try paying a £3 purchase in the UK and eyes roll. It is normal there.
When a card machine is presented you confirm the amount, or tap in a greater amount if you want to tip. Then either swipe or PIN and done. So much swifter.
I didn’t think I’d like it. However I do. So much easier. And if you use something like Monzo the app is up to date with your spending almost before your card is back in your wallet.
I see the benefits of cash mentioned above but I do rarely carry it now. A bit different from when I used to walk around with substantial rolls of notes in my pocket, the look over the shoulder when doing the wages run to the bank and so on.