Okay, when I said "it's not a complete loss" I meant actually "not a complete loss of time spent studying a dying language by me"... Because I frankly haven't set off with the grand ambition of saving a language. For me language learning is a kind of entertainment. And I see language change and language death as a natural process, so even if Welsh were dying I'd watch from the sidelines and perhaps record the progress...
Well, I started this reply to try to redeem myself as a non-callous human being, and ended by revealing my complete lack of compassion, I guess.

I mean, the majority of the Welsh people don't seem to particularly care for the language's continued existence, and who am I to tell them what to do?