I have never ever in my lifetime seen a front end application that was enjoyable to use.
That person then wrote "But for anything real, hell yes, give me a good build mechanism." which implies that he creates real, high quality applications.
But my experience is that all front end web applications are all sub-par, so it doesn't really matter if a SPA uses a bundler or not, it doesn't affect quality when it is all shit anyway. So more power to the guy who decides to not use the bundler.
In the end, I agree with Alan Kay, the web was created by a bunch of amateurs