I've really never thought about doing something on Brythonic vs. Goidelic. I mean, they both managed to survive into modern times, which is admirable. But you're right that several offshoots didn't, such as Cornish. And Manx is really in danger of dying out. I think it would be really fun to explore, but I wonder what resources would be available for research on that. I'll look into it… surely there must be some scholarly articles on the subject.But regardless of whether or not I find something on the demise of Cornish vs. the survival of Welsh and Gaelic, I've been thinking about doing something on the language as we progress so you'll definitely get something. I think it'll be in the Member section, since it won't fit into the narrative, but I'm pretty sure that I won't be able to resist talking about the strange ways English has developed.