Count me in here, as well! I'm still using my PSR-E433 that's almost 9 years old. I've spent years tweaking my settings and have gotten some really lush orchestral sounds, as well as some new wave type synth sounds, out of it. And the key feel of that keyboard is still better than any of its successors, and that includes the E473, though the E473 is pretty good.
Yamaha has still not added some basic features that I would have wanted on an updated version of my keyboard, such as the sustain pedal being able to sustain both sides of a split keyboard, additional registration slots, and portamento (which they have on the similar PSR-I500, but did not include on the new E473). Plus, Yamaha made a mistake -- in my opinion -- of moving the live control knobs farther away from the keyboard, so that a player cannot just hold down notes with his left hand while tweaking the knobs with other fingers of his left hand, like it's possible to do on my E433.
Yamaha has certainly added a nice complement of effects to the newest model, but I also have a Roland Gaia SH-01 synth that helps satisfy my need for portamento and effects -- and while I've only had that keyboard for about 2 years, it is a model first introduced way back in 2010!
I may consider the E473, but I'm in no hurry.