4500 status

I am curious if the 4500 will now be on the back burner since the progress seems to be centered on the 5000 series? What is in the mix for any future updates on the 4000 series?
Many of us started out with the 3000 series and upgraded to the 4000.
Upgrading to the 5000 series might be a little harder on the wallet than the 3-4 upgrade was, so please let us poor souls know whats up. Thanks for a great system. Larry

We will still be do software upgrades and still sell the AF-4500. A number of the new features will only be available on the AF-5000 do to the faster CPU, more buttons, and higher resolution screen.