I started playing Warhammer in about 1995, and have played off and on since then. In that time, they've modified the background on most of the world they ripped off... er, created so much that a lot of the original miniatures and rules no longer work. They've also introduced, with great fanfare, and then eliminated a whole lot of games. What are some of GW's best games? Mordheim (discontinued), BloodBowl (discontinued, though I expect it will come back now they've got a computer version), Battlefleet Gothic (discontinued)... there's also Space Hulk, WarMaster, Epic 40K, Inquisiter, and others, all released, pushed until they got popular, then canceled. THAT was why I gave up on GW.
I'm much more interested in small skirmish-type games than army-based games, and every time GW created one, they waited until they'd gotten a lot of new players hooked, then shut them down. All just part of a plan to get people over to WH and 40K.