Actually the PA1X is quite young, if you have a look at the Ketron SD1 this came out in 2001/2002, and has also been updated so as to keep customers happy.
The main thing to remember is that you don’t need to upgrade (Only update) a quality instrument every couple of years, as the fact that it has quality will keep buyers coming.
This is why I still rate the PA1X above the G70, E80 and Tyros 2 etc.

Bill