A lot of people made the same argument when Jobs removed the cd drive from laptops. It seemed like an issue at the time given most software was still installed from CDs. After a two year dark period where you had to use an external cd drive, most people didn’t miss it.
The first USB-C MacBook came out four years ago. I've just taken a look at Amazon: the top hits for keyboards are USB-A, the top hits for projectors use HDMI, the top hits for 4K screens have HDMI and DisplayPort ports. Apple's portable devices all ship with USB-A charging cables. Do USB-C thumbdrives even exist?
Yes, some transitions in the past worked really well. That doesn't mean that other transitions are automatically going to be a success.
ThunderBolt 3 is successful as a successor to the niche port that was ThunderBolt 2: for eGPUs, docking stations, some displays. USB-C seems to be doing okay in replacing Micro-USB. But HDMI, USB, and (for what they do) SD cards and Ethernet seem like they're almost in the same categories as wall sockets by now.
The top hit for laptop in a windows machine, so what?
I remember being so worried about dongles and got extra. But then I found it better to just replace the cable to the printer and not have a dongle. Now they sit in a drawer unused.
The only hits I find on google are for a few sandisk drives with terrible amazon reviews reporting they're slow and get searing hot in the drive after only a few seconds of use. I'm kind of surprised sandisk would release that, one reviewer even reports theirs smoking after being inserted into a recent MBP. I'm also a bit surprised nobody has produced a working drive yet? Maybe there's so little demand for thumb drives these days it's just not worth the r&d to accomodate the standard with adequate cooling.