Not including the Apple IIgs, did the Apple
IIe Platinum include all enhancements made by Apple?
For example, the first Apple IIe couldn't utilize the Double Hi-Res mode from what I understand. In fact, there was an "Enhancement Kit" for the IIe that, IIRC, had four new chips to give it capabilities the IIc had.
I was wondering if the Platinum edition also had some type of upgrade path that didn't include IIgs or third-party upgrades (no Z80 boards, for example).