you'd think everything up to about february 2004 would be on there, right? at least that would seem pretty logical to me. the late updates are purely security/internet related anyway.
the one update that stands out to me is the shutdown supplement, because hangs at shutdown are something that i have experienced in the past with 98se. there is also a WDM audio update in there that might be worth it, but it seems to be usually recommended to use vxd drivers anyway for gaming, with cards like sblive.
also, there is an update claiming to fix USB issues with AMD processors faster than 350 mhz and VIA usb controllers - probably relevant for some people running that combination.