Completely agree. Remember, PG and team wrote Viaweb in Lisp because that is what they were comfortable with. They got acruired by Yahoo because they had the users and the best product in the market. The fact that it was built in Lisp did not deter Yahoo at all.

Stackoverflow is built on .Net and nobody is questioning that now.

It could turn out to be an advantage that the others keep writing you off as 'destined to doom' because you are on the .Net platform.