usb-c is already here if you havent noticed, apple just jumped with it like others have done and will do. apples influence? masses dont use apple devices.. it is negligible.
but thank god apple is using standard usbc - like others do - and you have many options of devices which are able to work with your apple device.
Maybe on high end devices but for a huge proportion of the population of computing systems.. just simply no. USB-C is new tech apple are trying to push.
I'm a doctor at a hospital. All our PCs in work still have USB-A ports. I don't think we have any frontline computing systems with even one USB-C port. My PS4 still has a USB port. My Gaming rig still has USB-A ports on the front...
I can understand trying to remove outdated underused tech, I'm a fan of it. But USB-C simply isn't anywhere near the standard for most people and trying to remove it this early is nothing more than a bad-call. Of course you can get a dongle to workaround the issue but the associated philosophy of apple and MacBooks aren't about work arounds. Its meant to just work.
Apple did this with thunderbolt. They tried to push it and some people adopted. However I know many many many people who stuck with their SD cards and USB devices because they're cheap, plentiful and convenient. The apple eco system is already fairly narrow... but to narrow it down to even USB devices I can or can't use just doesn't appeal to me.
Like I've said, I think the OS is still beautiful and awesome. I'm hoping for an update to the iMac and/or mac mini and I'll stay in the apple ecosystem for a bit longer but the days where I spend £2000+ on a apple laptop is over.
I have zero issue with USB-C and I doubt others do too. I have issues with dropping SD card slot, HDMI port and USB-A.. along with getting rid of a superior charging solution. That isn't even touching on the awful non premium feeling keyboard of the butterfly switches. If I wanted a gimped up laptop with compromises, I'd buy a macbook air or macbook. Really don't expect this from what I feel the macbook pro line was under Steve Jobs.
In 5-10 years time, people will look back and possibly the SD card slot and USB-A will be obsolete... but thats a long time away.