It's not a bad question, but approaching it from a CS perspective will cause you to blow your foot off--because it's not about code length or code clarity, it's about safety (which is orthogonal). Your stack's of a finite length, and eventually will grow into the heap unless your system has protections against it.
In most systems lots of really important stuff is allocated at the bottom of the heap. It's very easy for a clobbered global flag (yes, hissss, globals, these are very constrained computers we're talking about here) to cause a system to have its shit get real at an alarming rate.
In most systems lots of really important stuff is allocated at the bottom of the heap. It's very easy for a clobbered global flag (yes, hissss, globals, these are very constrained computers we're talking about here) to cause a system to have its shit get real at an alarming rate.