So Piru, what do you use MorphOS for?
replied hereTo elaborate, I've written all sort of things in MorphOS, here's some of the components I've touched over the last 11 years:
quark (kernel)
abox static and jit (trance) 68k emulators
abox exception handling and processing
btree,library
ramlib
sysdebug.library (built-in segtracker)
cyberguard (built-in enforcer)
exec.library
dos.library
shell
resident shell commands
utility.library
intuition.library
graphics.library
layers.library
cybergraphics.library
commodities.library
gadtools.library
cia(a|b).resource
card.resource
misc.resource
battclock.resource
battmem.resource
potgo.resource
clipboard.device
input.device
keyboard.device
timer.device
network drivers (SANA2)
monitor drivers (CGX)
scsi/sata/ide device drivers
c commands
various disk based libraries and components, too numerous to list, there are probably only a couple of things I haven't touched
datatype system
ixemul (nix port compatibility share library)
debug.lib (debug link-library)
libnix (amiga.lib replacement)
arexx
ambient, including icon and workbench libraries
contributions to poseidon (usb stack)
Degree of my involvement in each component of course varies. Some things I've written mostly myself, while other contributions are rather minor (bugfixes). The list is awfully incomplete, I grouped ton of stuff to "various disk based libraries and components".
In short, this is what I use MorphOS for: Developing MorphOS.