I have just upgraded from Caldera 2.4 (kernel v2.2) to Red Hat 7.2 (kernel 2.4 and glibc 2.4.x). I neither did that earlier nor I installed Red Hat 9.0 because I feared the GUI would run too slowly, even in my Athlon XP 1.7 w/ 512 MB RAM. I guess I will have less headaches when trying to compile/install packages from now on (gcc 2.96).
My first achievements were to compile and install MICO and LuaORB.