I’m going to assume it’s the typical “Nobody ever get fired for buying from IBM” mindset
That’s pretty much it exactly. Yubico has the required features, are widely supported, and are widely used. They have a track record of reliability.
Other viable alternatives definitely exist, but they don’t have the same real-world penetration. The disadvantage with that is if you run into a platform-specific issue, finding someone who has had the same issue before and posted the solution somewhere becomes far less likely.










I’m not sure if it’s done differently now, but historically, you’d use a bunch of gas centrifuges in series to separate the isotopes based on molecular weight. Each time you run it through the process, you end up with a higher concentration of the 235 isotope. The heavier 238 isotope then gets repurposed in armor piercing munitions.