I know at one time the Doug Hall Controller was quite coveted, and if you found one available expect to pay a premium for it.
That was before the numerous uc repeater controller projects were published. I expect there are a lot of lrgacy stand alone installations out there just chugging along as expected.
Being as full featured as possible is always a good thing (from the end users side of the equation)
I too have no idea the most used features for Amateur installations.
You've met the equal compatibility design for the Xcat with 2k support.
The X9000 is really the only application where not having 8k codeplug support could hinder it's abilities.
It may be possible to use in 2k configuration if Doug Hall support was required.
Looking at the addr lines used, 1k emulation operation is not possible for the X9000 to be compatible with OEM RSS, and maybe not at all.
In the OEM configuration for a 2k EEPROM, the PL data storage area is above the 1k boundry.
