I agree that loss of language is a terrible thing. It comes, perhaps, from living in an age of a monolithic society. With mass-communications, it’s much easier if there are just a few major languages, Japanese, English, Chinese, German, French, Spanish, Portuguese, etc.
Cherokee, which, by the highest estimate, doesn’t even have enough speakers to make a big city, isn’t considered one of the world’s more endangered languages. There are so many languages, spoken for centuries by ancient nations, all around the world, from Africa to the lands of the southern ocean, from Europe to South America, that are dying off, like endangered species, and with every loss of language is a loss of culture and a loss of a way of seeing and understanding the world.
I don’t think Cherokee will be lost to scholars, barring some cataclysm that disrupts academia as we know it, because it is a documented language, with almost two centuries of written literature. It would continue in use, among certain specialized individuals, somewhat like Latin or Old Church Slavonic or other languages which survive only in specialty use.
There are American Indian languages where this has happened. The Wyandottes completely lost their language, but scholars remained who knew it, and revival efforts seem to be underway among the remaining Wyandottes (I have Wyandotte best friends). http://www.wyandotte-nation.org/language.html
I think Cran is right. With Cherokee, it’s not too late. The Cherokee Nation has been working with the Hawaiian people to learn their methods of language revitalization. We have free classes being offered in the communities to teach the Cherokee language. Native speakers are teaching the language in colleges, public schools, and even through interactive online live video. The local Cherokee Headstart program is using immersion classes, so that the young children are able to learn Cherokee in their developmental stage. One public school has expanded the immersion classes through the first grade. This is having the effect of not only bringing a new generation of speakers, but they in turn influence their parents to learn.
It’s uphill, though. It’s only been recently that Cherokee has even been added to the Unicode standard, and there aren’t a lot of resources. Most books in the language are out of print, and only to be found in library special collections. There are no television channels in Cherokee, or even radio stations, though there is a radio program or two in the language, which is of immense value. There are also a few animated short films in Cherokee.