[sam_lowry_]

For one, they had a a major f-up with eIDs in 2017: https://ria.ee/en/news/estonia-resolves-its-id-card-crisis

And they are just good at marketing. Belgium had eIDs earlier never messed up so much as Estonians.

[Muromec]

Yeah, but it was the vendor who fucked up, not them. One can argue that using long-term certificates is bad practice in itself, but that's arguable.