I am probably wrong, but I think Fido2 keys should be ubiquitous. They provide a hardened solution for some security situations, certainly they could be a good 2nd factor or 3rd, and hopefully they could reduce the password madness we have. Yubico appears focused on the enterprise and high end users resulting in higher prices. Solokeys seems more focused on individual users with lower prices.
Disclaimer I have two Yubico keys, and two Solokeys and they all work for me, but I don't need the extra functionality of the more expensive Yubico keys.
Disclaimer I have two Yubico keys, and two Solokeys and they all work for me, but I don't need the extra functionality of the more expensive Yubico keys.