Why could your new design potentially become the next USB-C standard if it offers significant benefits?
If you take the trouble to design an alternative it will undoubtedly be better than USB-C, otherwise you won’t
You’ll just need to be willing to allow your design on third-party devices so it can become a standard, not a vague brand-specific or proprietary standard. This can be a disadvantage for some closed companies because they may apply fewer constraints to the supplier, but only profit for the consumer.
Yes, between the time your new port / protocol is released and labeling it as a new standard, all the paperwork will take a long time – at least 5-10 years I believe – during which you will really have to maintain two different ports. It may sound long and unreasonable, but it hasn’t been much different in the past from a backward compatibility standpoint, has it?
The first version of USB dates back to 1996, but it took until 2006/7 for the parallel and serial ports to disappear on most new desktops. The first digital successor to VGA (DVI) was released in 1999, but VGA was still present on virtually every video card or laptop until at least 2010 and before it really disappeared from everyday life until 2015. So those too they are just transitions. over 10 years in which both standards coexisted.
I see it a bit like the same principle with the normal 230V socket, which is a standard that has been the same for 100 years and with which every appliance (except heavy ones like stoves that don’t have enough of 16A) without having to think further for to work. It’s just great we’re going that way for peripherals, smartphones and laptops too