Here are my thoughts: making vim startup time shorter is GOOD added complexity - BAD my main concern is with the complexity that gets added to get startup time improvements. User has to tag scripts, and then manually BundleBind to get scripts loaded. This seems like too much hassle(manual involvement) to me. Fixing 1 time thing (startup) we're adding many more (like BundleBinding required scripts once they're used) For instance in my case i don't start Vim often because i'm using --remote-tab-silent option. So i'll get no benefit along with complexity (

The alternative was to have multiple scripts or stylesheet links on one page, which would trigger multiple HTTP requests. Multiple requests mean multiple connection handshakes for each link “hey, I want some data”, “okay, I have the data”, “alright I heard that you have the data, give it to me” (SYN, ACK, SYNACK). Even once the connection is created there is a feature of TCP called TCP slow start that will throttle the speed of the data being sent at the beginning of a request to a slower speed than the end of the request. All of this means transferring one large request is faster than transferring the same data split up into several smaller requests.

It won't affect your startup time, as scripts are loaded only on demand*.