In the end it's a simple question, what would be more effective in regard of the target-audience ?

X1000 or a (re)start of the G5 port ?

SAM 4x0 or more G4-Mac options (not that there are many left) ?

Or maybe not adding more (PPC) options at all ?

"drivers" in this case also means much more than just some slightly different IDE/SATA or sound chip, it means adding support for new CPU-families, working around quirks&bugs both in those CPUs, the mobo and the firmware (and yes those do exist) all for HW that must be bought at high prices while promising rather limited returns.

Nope, the decision not the support "pharmacy-HW" is a very wise one !