Unfortunately we're going to be stuck with USB-A for a long time. I went on a flight not long ago on an American Airlines 737 with its new "refreshed" interior.
Right in front of me on the back of the seat in front of me was a USB-A connector for charging my phone. If I only had the USB-C to lightning cable that comes with newer iPhones, I wouldn't have been able to use it to keep my phone charged. Luckily I always travel with a couple USB-A to lightning cables.
Most phone charging stations in the wild use USB-A still. I rarely ever see a USB-C port in my travels. New cars only started coming with USB-C fairly recently, and they're usually "charge only" ports that don't let you use things like CarPlay.
USB-A will be with us for a long time still, it's still being put into new stuff, and we're going to have to keep an USB-A charging cable with us for the forseeable future if we want maximum convenience.
EDIT: Looks like there's solutions out there for people who don't want to carry extra cables. But still, you're not going to be able to avoid USB-A for a long time!
USB C Female to USB Male Adapter 4 Pack ,SOCW Type C to USB A Converter Compatible with MagSafe Charger,Laptops, Power Banks, Chargers, for iPad Air 4, iPhone 11/12 Pro Max, Samsung Galaxy S20 etc, grey
www.amazon.com