Ya, people seem to hang on to them.
Its the poor mans version of the Lexus GX and LX(?) that have become a "thing" to upgrade older ones for off-road stuff.
I've asked a few 4runner owners or read opinions on forums for "whats the best year?" 2018-20 seems most common.
I sure do like the looks of the new gen esp trail version and looking forward to user reviews on the hybrid in towing, soft roading, etc.