User expectations are the main problem with USB-C. As long as people expect that USB-C ports are fast, computers will only have bandwidth for a handful of them, and USB-A will remain necessary.
The way I see it, the problem was the the USB consortium just released the spec but did absolutely nothing to help the adoption. In fact, many things (like cable abundance) were blatantly mismanaged. There was no infrastructure, no chips, no transition roadmap. PC peripheral market is extremely reactionary, they it is not going to jump onto the bandwagon. If the entire thing were managed better, we'd have 100% USB-C adoption two years ago.
I once heard an idea that established technologies tend to die in reverse order. The longer something has been around, the longer it will probably remain. I would not be surprised if USB-C died out before USB-A.
If USB dies as a standard within next ten years, that's a remote possibility, yes. For now, USB-C is the USB connector going forward. USB-A has been officially discontinued in 2017.