A&E was releasing non-anamorphic widescreen DVD's of their titles up till about 2013. But I've also seen other examples were the studio's created a widescreen master in the 1980's for VHS & Laserdisc release in a 4:3 matte. One of my favorite movies, "The Great Locomotive Chase" (funnily enough a 1956 Disney movie starring Captain Christopher Pike, Jeffrey Hunter) has been released on DVD three times - twice by Anchor Bay and once by Disney--- here in Region 1, and all 3 times they've used the 480i composite master that was created in the 80's for Laserdisc. The 1997 Fox movie, "Home Alone 3" has been released on DVD a number of times, but for some reason they keep reusing a 480i non-anamorphic widescreen master that was probably intended for the film's Laserdisc and VHS releases. And yet this past Christmas I was able to record the film off TV in 1080i anamorphic widescreen and create my own anamorphic 480p DVD.