I think what stalker0 is thinking of is one of my characters in an epic game he ran. I was a mystic theurge, and the way the epic spell rules are written I get double the normal slots/day since I qualify for them as both a divine and arcane caster when I take the feat. Not hard to develop epic spells that make doing almost anything to you pointless if you use the right abjuration-based spell seeds. I think he was a bit annoyed that I could cast disjunction 6 times and was immune to it (not to mention my epic dispel)

I guess that is a case of items not mattering as much, but I know that most of the other characters in the party would have been fairly gimped (aside from the sorc) by magic item loss. Its not in question that a high level rogue can deal huge damage whether they have items or not. The real issue is all the abilities items confer that make dealing that damage possible. The loss of some kind of magic mobility aid alone is enough to really hurt most melee classes at this level. Maybe its just the games Ive been in, but it seems very few noncaster epic classes are without those epic speedy boots, or boots of teleportation or some other type of magical movement aide. I know a lot depends on the environment combat occurs in but if your target d-doors away from you to the edge of his long range, at that level it can be quite a jog to get back to melee range with a base move of 30ft.