> I think there's a bunch of factors to why yubi have upped their prices - not least, waiting for competition in their form factor & not seeing any emerge (token2 & nitrokey are much bulkier)

It is true about the size.

Sill I do not understand the price difference between 5C Nano [0] and the PIN+ Mini-C [1]. 3 to 4 times more expensive depending on the currency.

- [0] https://www.yubico.com/pt/product/yubikey-5-series/yubikey-5...

- [1] https://www.token2.com/shop/product/pin-mini-c-release3-1-fi...