In this livestream, I used Alchemist Camp as an example to go through upgrading Phoenix deprecations, such as @view_module, @view_template and even render_existing/3... or not!
Seriously, if anybody's got a solution for programmatically determining whether or not a template exists once render_existing/3 is gone, please share! At this point, the options are looking grim, but there may be some very clever solution involving macros or something in Phoenix that I've missed.