the remastered program that jordan brand introduced across many of their retro models kicked off in 2015 (technically dec 2014 with the frag 1 release), with JB introducing a new mold for 1s (aka remastered mold)....which included a higher cut, better shape, and softer leather...along with the alleged overuse of tumbled leather, but some actually prefer it.
the og colorways in this era are highly regarded (15 chi, 16 black toe, 18 shadow, etc) as well as many retro+ colorways (15 sbb, 18 game royals, 19 obsidians, 20 mocha, etc). there were some colorways that actually hit heavily discounted prices between 2015 and 2017 and the top end for chi's/breds was only about $400-500. it wasnt until 2018ish when 1s became part of the hype train and everything seemingly shot to astronomical prices.