I own the old Jeep Cherokee and still have it. I swear it still has the engine light on and driven it a further 8 years with that light on. Amazing.
Engine light usually means nothing more than emissions (The Environment(TM)) these days. EGR valve, etc. You can afford to ignore it unless you must go through Enviro(TM) inspections.
They were good cars, though. We finally gave up my husband’s (GRAND Cherokee, as he will correct you) last year for a new GMC after 18 years.
Friend has a couple the same way...says if the light ever goes off he might worry