I guess Cirrus just marketed it well, and went for a market of non aviators by convincing them they could get a PPL and jump in their shiny new Cirrus for not much more than their Ferrari cost them.
I think some new piston prices are obscene, especially when a Jetprop in good condition can be had for $1M, will totally and comprehesively beat an SR22 into dust on every parameter (except the BRS, and perhaps the extra training before you can get insured), will more than beat an SR22 (and perhaps every piston aircraft) into dust on straight mission capability, and anybody with 750k will have 1M.
Agreed, and I know what I would have. However some people just like what they know, won't go the distances which keep turbines economical and are put off by the potential bills an old turboprop may bring compared with a brand new warrantied piston airplane. Also not everyone is capable of the transition, the good ones know this and stick with what they are comfortable with.