I'm not sure that I'm more surprised that it's only been 10 years or that it's been that long. I mean, that's a relatively quick turn around to pretty much dominate TLS certs to the point that it's the default for so many platforms... that HTTPS has become such a norm over the exception.

On the other hand, has it really been that long, it seems just yesterday I was first trying to configure nginx for it. That said, since I discovered Caddy, I haven't really looked back, though I do use Traefik too.

I mean, by comparison, it feels like IE6 took longer to die than Let's Encrypt has been around.