[cesarb]

The kernel has gotten bloated. Back in the day, it could easily run in 8 megabytes of RAM, with plenty left over for the userspace and cache. Nowadays, just the kernel code (before loading any modules) is already bigger than that.

[l33tman]

I was one of the first who worked on embedded Linux, and I put the kernel and a user-space program in a device with 512kb RAM once. It was too tight to do anything useful with, but just barely. It was no problem doing useful stuff on a 2 MB device (this was in 1999) :)

Though to Linux defence, it is not nearly as bloated over this period of time as, say, Windows, by orders of magnitude. And, you aren't required to compile in everything. It's just very tedious (and frankly a bit pointless) to trim it down..