Don’t get me wrong. Apple removing audio jack was the biggest facepalm in smartphone history. And you can thank it for not being able to make an upgrade without sacrificing audio jack (and SD card too :/). But USB-C is getting standardized everywhere now (laptops, smartphones, etc.). What makes USB-C earphones not worth the switch?
I have the official Apple Lightning-Aux for my AKG K361 and Grado SR60x. It has definitely adequate audio, no complaints.
I use the Apple USB C-Aux I use for when I use any headphones with my gaming PC (usually Koss Portapros). Also definitely adequate.
My impression with either one is - except for physical durability concerns, if either adapter can power what you’re plugging into it they’re awesome. If you need more power or physical controls or weird connection formats that’s where they start to not be great.