Where's this ~1ms overhead for an additional asset on a HTTP2 connection coming from? Do you have a reference to a benchmark or something that demonstrates it?
IDK what calvin had in mind, but the client pull model you suggest can require a lot of round trips. Request a, parse a, execute a, request b, parse b, execute b, request c, parse c, execute c.
Of course, you could always do server push, but hey...that's pretty close to what a single bundled file is :)
Of course, you could always do server push, but hey...that's pretty close to what a single bundled file is :)