[shadowgovt]

It doesn't work nearly as well in Linux as we'd want to impose such a design on the web.

"apt install myapp" works 95-99% of the time. The remaining time, you drop yourself into DLL hell of some flavor or other (package was poorly maintained, or your clone of the package repo indices is out of date, or you installed a local copy built-from-scratch of one of the binaries and it's now fighting with the distro binary, &c &c). And then remote tech support is impossible because for someone to provide support, they either need intimate knowledge of your configuration or you need to be running a stock configuration (and with very few, usually vendor-controlled exceptions, "stock configuration of a Linux distro" is a non-concept).

There was, ages ago, a paper describing what the design of a componentized browser rendering engine would look like (where pages could basically declare "I require engine components X, Y, Z" and the browser would have a library of them that could be spun up on a page-by-page basis). I wish I could grab a link to it; I think it may have been a Mozilla experiment? If I recall correctly, the complexity meant it never gained traction.