It would have been nice if the article had stated what is meant when a language is declared 'extinct'.
This is a term used by we linguists when a language is no longer learned as the first language.
To truly revitalize a language, it *must* be taught as a primary language. I have run a program attempting to revitalize an extinct language, and I know how hard and difficult it is for those involved. So, kudos to those who do exactly that.
As far as dialects go, I agree with Max Weinreich:
אַ שפראַך איז אַ דיאַלעקט מיט אַן אַרמײ און פֿלאָט
"A language is a dialect with an army and a navy."
Ennys, I totally understand your pain. We hold so much identity with our language - personal and cultural. As far as it being a constructed language, no - at least not by the technical definition. (If I understand properly the terms of the language you are describing.)
I could go on forever about the technical stuff, but that is kind of outside the scope.
Personally, it saddens and bothers me anytime any
language goes extinct.