Could very well be that's what they cut their karaoke teeth on.
When I started, Pioneer lasers were the primary disc (seemed to be a west coast thing) & DK seemed to dominate the eastern side. When I finally heard of DK, I thought their music was complete garbage, but those who started with them thought the same of the Pioneer. You get used to what you hear first. I have some older absolute crap versions of some songs (weren't ever out on other brands at that time) but they got sang. When I got very good versions, I tried to replace, the die hards that learned on the old version still request THAT version over the obviously better version.
