well, frame off restoration also wrings out all the potential future problems that would arise and possibly leave you stranded.
ofcourse, if any vehicle is worth restoring, its a Jeep for sure (IMO)
its up to you whether or not its worth restoring. I personally would say no if its still driveable but has a few minor problems, then drive it till it dies and get all your worth out of it before taking it apart. If it runs like utter crap and everything seems to be falling off/apart, then it may be due for a resto, or atleast a full drivetrain rebuild and good cleanup.
2011 Jeep Wrangler JK - 33" BFG KM2s, 2.5" RC BB, ARB bumper, IPF 900XS, Superwinch EPI 9.0, AEV Snorkel
1995 Jeep Wrangler - 4 cyl, 2.5" lift, BFG AT 30s, Ford 8.8, SYE+CV, AX15 swap, ARB snorkel, Aussie locker + loads more - sold
1978 Jeep CJ-7 - 304 V8, TH400 auto and quadratrac
2007 Jeep Liberty - Mother's Jeep, BFG ATs and....mud?