Agreed on the FJ with bolt-ons isn't "hardcore" in modifications.
On the Meta side.. with how diluted a lot of the forums and general off road enthusiast level of hardcore-ness just hitting actual trails instead of dirt/gravel roads is more hardcore than what you usually see
So to the original question on rigs getting used over 200K miles. Yes, 244,000 miles and not a straight panel in sight, driven to and from trail rides in OH, VA, KY, NC for the past 13 years since its build. Still 3VZ powered
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Ironically my DD/camping/light wheeling family rig is an FJC almost identically setup to the OP's. 210,000 miles and still does big trips to GSMTR, KTTR, Slade KY and tons of other lighter rides without hesitation. Gets wheeled more than the 4runner since I take it when I have my kids with me..