Yeah, some of them do. I have seen guys on honda-tech pumping out 700 whp still on stock ignitions. The only time you really need to think about upgrading is when you can't prevent misfires from closing the plug gap down anymore. The boost will blow out the spark, so an upgrade would be a good idea.

Most guys that have MSD ignitions for no reason have tons of problems and end up going back to an OEM ignition system anyway.