The position of the global digital community is: Adobe Flash is dead due to all the security flaws found in this plugin. I have started upgrading the old Adobe Flash Web galleries (pre Lightroom 6) on the site to TTG (The Turning Gate CE4 Page template). TTG substitutes html for Flash (files are created in .php). With the advent of Lightroom 6 (Lr6) new features, I am re-evaluating and re-editing past slides (time consuming).
The TTG visual slide presentations in Lr Gallery will be vastly different than the original Adobe flash shows. Most notability, TTG will only display 50 slides at a time for the desktop slide show. After 50 you must hit “Next” to go to next page and hit the play arrow (top right). I am told a fix is coming to allow full slide show playing. The mobile version of TTG is unaffected but does not offer auto slideshow presentation (you must click the right and left arrows on the slide to advance forward or backward (annoying). You can watch the same slide shows with full play/replay/pause by going to the “Photo Gallery” Tab.