Since the 1960's, when road construction really accelerated in Thailand, the economic importance of the train has been dwindling. Now it's largely used for commuter purposes. Many of the small towns, once booming, which flank the tracks, have gone bust. If I find an operating theater in any of them I'll do a back-flip.
From there the plan is to head east, into Isan - Thailand's vast plateau region; home to it's largest concentration of humanity outside of Bangkok. If luck is on my side I'll be able to watch Yam Yasothon 2 in a stand-alone theater in Yasothon Province. It's a long shot, but hope prevails.