I don't think so, or the language would have died out already. I'd argue it's more about whether children learn it as their primary language.

Also, because of concerns of linguistic extinction, similar to the ones mentioned for Icelandic in the article, you see somewhat of a counter-movement as well. This caused e.g. a special status of the language by law (see e.g. [1]), and also:

* it's a mandatory school subject

* you are entitled to using it in government interactions, e.g. in court

* a small part of the public television is in Frisian, and there's also a regional tv/radio channel using it exclusively

* place name signs are often at least bilingual, and sometimes Frisian-only.

[1]: https://en.wikipedia.org/wiki/European_Charter_for_Regional_...