This is pretty neat. I wish there was a USB-C model.
All the usb-c connectors I know have soldered body connections, which makes for a really poor mechanical bond. Solder joints are full of mechanical stresses and the only thing preventing a bend is the copper delaminating from the pcb.
In usb-a, any bending has to break the entire substrate. Decent plated contacts will outlast the connectors they're plugging into. On top of that you can plate something like a yubikey on both sides if you wanted to, so the only advantage is size and it's not like you're plugging these things into your phone. As long as computers still have a single usb-a (and they should, if only for backwards compatibility) it's a non-issue, IMO.
What I mean by solid strain relief is basically a plastic float that bridges the soldered connections to the connector body. I haven't seen one like that, but it's necessary to isolate the connector itself from the board and soldered bits. Covering the whole thing in goop helps for excessive force, but does almost nothing for the everyday wiggles that eventually cause connections to loosen. You need built in flex for that.
Solokey is also pretty good.
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.
[1]: https://i.shgcdn.com/25b75d64-fced-4845-acc5-91c39d0029bd/-/...
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.
[1]: https://cdn10.bigcommerce.com/s-u7jmw/products/93/images/840...