Unclassified languages are languages whose genetic affiliation has not been established, mostly due to lack of reliable data. Most of those unclassified languages have this status because they belong to isolated or lost tribes that are hard to get a hold on. I came up with this term when I was doing some reasearch about the "Sentinelese" tribe, I'm not sure if you heard or read about this news but there was a missionary that thought that it was a good idea to turn the Sentinelese to Christianity... I think that's insane (If you feel curious: https://www.dailymail.co.uk/news/article-6446515/US-missionary-John-Chau-killed-remote-Sentinel-tribe-obsessed-years.html).
So, back to the topic, do you think that it's a good idea to leave an isolated tribe alone? Do you think its a good idea to try to impose them a culture so they can "fit" into the modern world? Do you think that in a far future it'd be possible for the people to get to know these people, their language and culture? If it wasn't for the Spanish realm, I'm not sure if I ever existed or which language I'd be speaking right now so I have crossed feelings about this topic, don't get me wrong I think that it would be awesome for the Sentinelese to keep their land and live a life of their own, I think that if they receive any influence from the outside world we'd be loosing another extrange but not endangered language.