pilots who fly with a G1000 and don't know what most of the features do. This was just as possible with a GNS530 for example but there is a difference: the 530 was probably flown by the owner who probably did read the manual, whereas a G1000 could likely be in a DA40 flown by a renter.
I think you have it the wrong way around. Plenty of rental aircraft have GNS430s but I bet you can't find a G1000 aircraft for rent anywhere that doesn't require a reasonably involved ground and flight training course before someone with no G1000 experience could rent. I think the G1000 pilots "who don't know what most of the features do" is a forum myth, except perhaps the bottom layer of non-essential features, which is fair enough.
I've just been flying a G1000 WAAS + GFC700 C182 in the USA, doing LPV approaches etc. There's no comparison with a legacy panel. None. IO, I know you'd want to remove a G1000 and put a multi-box legacy panel in, but I think you might be about the only guy on the planet who would!
brgds
421C