I really don't get the Dyson hate for their vacuums, are the newer models rubbish or something? My folks have old the DC02 (bought in 1996 or so and still runn

I really don't get the Dyson hate for their vacuums, are the newer models rubbish or something? My folks have old the DC02 (bought in 1996 or so and still running) and I own the DC25 (11 years on and still works great).