Well I can't argue with that track record...but I'm going to anyway.
I guess it depends on what an owner's habits are. If I see a fault I want to know what it is and I like having my IIDTool. If I'm off-road I need my IIDTool to clear any faults. I of course need the IIDTool to get my taller EAS settings activated.
Idk....I mean suit yourself but most here would agree that an IIDTool to an LR3 is as valuable as a socket set to a Jeep. Would you drive around (long distances and off-road) in a Jeep without a socket set or at least some spanners?
I'm not trying to sell you an IIDTool...I'm just sharing my experience because I think you can benefit from it. Even if in the past 9 years you just haven't done anything noteworthy with your LR3, you are about to, so having the right tools in your kit might be wise.