We at Microsft used this to build apps.microsoft.com. We're quite happy with the results. Shoelace is customizable, accessible, extensible, easy to use.
[0]: https://blog.fontawesome.com/shoelace-joins-font-awesome/
I.e. it's proof that Shoelace, in this case, is not inherently useless. But it's hard to get a hunch for how good it is to a mere non-corporate.
Gotta give props though, the apps site is fast and slick.