They've got the best kind of connector I've seen[1], with soldered joints on both sides of the board and a little wrap around, but it's still not as solid long-term as the USB-A keys. Over time the solder will start to crack. It also requires a much thinner board, so it's fragile because of that.
With a high-quality product like a 2factor key, this may not be an issue. But wifi/bluetooth/SDR dongles and adapters get made to much lower standards and with cheaper solder. Cheap solder is far more prone to degradation.
And one of mine already jiggles and has unreliable connection because of stress. I've cringed when I accidentally yanked my computer not realizing it's charging or connected to something else.
My next macbook, I'm definitely buying those 3rd party magsafe-like dongles that sit in my usb-c ports!
> My next macbook, I'm definitely buying those 3rd party magsafe-like dongles that sit in my usb-c ports!
Do you have any recommendations on brands by any chance? I don't know anyone who has them, but I've been considering getting a couple for my phone and random devices that use usb-c.