Khaled continued support for 3.x for a very long time after not many ppl were still using it (actually there were times when i thought a certain bear and i were the last 3.x users left on the planet). The issue was that 3.x was 16 bit, and Khaled eventually focused on 32 bit only (which 95 and 98 are, so no worries). Removing a lot of 16bit-specific code solved some old probs and enabled a lot of improvements.
