A Windows Gui wallet it was recently released but there is no Mac or Linux gui wallet today, so most of non tech guy still leave DCR on the exchanges. And this is NOT a good politics (did I mention Bitfinex?).
I strongly belive that first of all, DCR need a complete suite of GUI official gui wallet.
There are wallets available for those platforms I believe, you just have to browse the Decred forums to find them. They're just not the offical ones.