Mike,
I have extensive experience with JDE as as end user and can direct you to an excellent resource if you need assitance with implementation, etc.
I've implemented "World" version of both the Equipment & Plant Maintenance (E&PM = CMMS)and Job Cost Modules. These are both the older character based "green screen" version although I know that their newer Entrprise is more current.
From what I'm reading Oracle is committed to maintain JDE for the foreseeable future (10 yrs +/-).
JDE World version is primarily a financial package so that tends to be where its focus is. It soes a great job with managaing the financail aspects although it's much less than ideal on "CMMS" aspects. The
The Enterprise version has been rated very high in Gartner's EAM "Magic Quadrant" EAM (Enterprise Asset Management) analysis.