Yeah... And I can edit 4K video, encode/decode dozens of video/image formats, render a web page, etc. I get a JavaScript JIT, Perl, Ruby, and Python. I also get frameworks for mapping, photo editing, asynchronous execution, and many others.
The OS is bigger but it sure is more capable.
I'm not complaining... just observing. I'm not one of those who pines for the "good old days" of cooperative multitasking, unprotected memory, and application errors taking down the whole system.
Although I do find it remarkable that they were able to stuff so much into such a tiny amount of space (everything had to fit on a 400KB disk plus the 64KB Toolbox ROM, and the OS plus applications only had 128KB of RAM to run in).
And now, on El Capitan, I've got a /System that's 8 GB, with just over 296,000 items in it. And that's not even the whole OS these days, since there's the unix-y stuff in /, a few bits and pieces in /Library, and some more stuff that ships with the OS in /Applications.
Makes for an interesting contrast.