I've never had ABS, so I don't know what I'm missing I guess.
I had linked brakes on the VTX and liked 'em. F6B has linked brakes, so when mine is ready to be picked up I'll have 'em again.
I believe full-on sports riders may prefer un-linked, but for my riding style, there are no drawbacks to linked.
ABS on a bike? Well, I suppose so, but If it was an added cost option, I'd probably decline.