There’s no denying that a recent influx of ’80s-themed Tumblrs has showcased the decade’s fashion, interiors, pop culture and art in vivid detail. And no Tumblr offers a more comprehensive and well-sourced collection of 1980s artwork than “80s art,” created by Jason Cawood. Vibrant geometry, abstract forms and bold designs reign on Cawood’s Tumblr, which is a clear fan favorite. This past week, I had the honor of corresponding with Jason Cawood, who shared his thoughts on a range of topics, from ’80s art trends to Tumblr’s role in the decade’s unfolding revival…