Anyone out there have any educated predictions on when Yamaha will replace the WXA-50 streaming amplifier? They have had this on the market for quite some time. I am disappointed that they are not going to update it with Amazon Music given that it appears to be their main streaming product, yet newer Yamaha HT receivers do have Amazon Music. But, I have two other Yamaha receivers in my house, and want a MusicCast compatible small amp for my home office, so this would need to be the one. But, I would hate to buy this now and then see them come out with a WXA-60 in a few months that includes Amazon Music (HD?), USB DAC functionality, and whatnot.