What you just described is what I always describe as the ideal web deployment system. Most of my dev is in C++, but I couldn't believe the inefficiency found in sniffing everything at runtime versus using what already exists to serve up different pre-compiled targets specifically optimized for all the major browser versions active in the field. It seems that products like this that span the dev workflow (compilation) / operational (sniffing server) gap are hard to get off the ground since many devs can't touch the ops side.