Just because something isn't in the public eye doesn't mean it's irrelevant on today's music platform. It's still inspiring artists, the video is still shown every Halloween, and it's about as popular at weddings as the Electric Slide.
Music evolves, naturally. There's stuff that is ahead of its time, stuff that is timeless, and stuff that will just fall to the wayside. I think a lot of Micheal Jackson & his brothers work is highly "relevant" to this day. It doesn't have to be flying off the shelves, or burning up charts or even radio station telephone lines. The relevancy is in the inspiration, which is in plenty of pop artists.
He's no musical King Midas, but that doesn't mean that he should be underminded once his music stopped resembling that of what he's famous for. There's always THAT to consider. Of course he's made some less than stellar music, probably made on the fly to zap some debt. (Part of the reason he let go of some of the Beatles rights he owned.)
This whole issue of relevancy is just as subjective. Especially taking into consideration the mechanics of what makes music timeless, and even though publically fleeting, inspiring people to this day underneath it all.
It's probably because electronica is a very saturated genre, with a lot of limitations. Everyone uses the same equipment, usually relegated to a singular member, maybe two, and conisdering it's underground, you can't have "breakthrough" music very often because it'll get written off as monotonous and repetative.