I'm not really on the same page as the author, the reason being: This model works well for Vim, because its basic principles are sound and compose well. You can build pretty much anything on top of that while still scaling pretty nicely - but also in this regard, there has been progress (multitasking, to name it). Ironically, this holds true even though Vimscript is generally agreed upon as not being an ideal scripting language - in which regard it shares some similarities to javascript ;-)

If you look at browsers however, things are different. We've only started getting rid of plugins like Flash. HTML 4 is not the standard I'd like to be stuck with. HTTP<2.0 is terrible for various usecases (some argue even HTTP/2.0 isn't that much of an improvement). And so on and so forth. The web is basically "hacks all the way down" (yes, things like asm.js are not necessarily correcting that ;-) ).

So, I personally am rather glad that we're not stuck with "ye olde ways". If we could learn something from Vim, it would be the way it's built on sound principles - but that's hard to achieve with organically grown systems like the web.