I got lost in another forum where Canadian owners were listing the complaints with the previous air suspension and almost talked myself out of it as a "future problem waiting to happen." After looking for Texas-based problems I almost couldn't find any and then noticed this little blurb on page 7 in the downloadable TX brochure ("The Strongest Ram 1500 Ever" page):
"Completely unique to the light-duty segment, the automatic or driver-operated
Active-LevelTM Four-Corner Air Suspension System is available on all trim levels
(except Ram HFE). The system has been modified for 2019 Ram 1500, now
with a redesigned air supply unit in a single unit to increase capability and
reduce weight. It’s also been retuned for the new, lighter-weight frame and
chassis components."
I have not seen any other mentions by RAM on the redesigned compressor. Maybe they didn't want to make a big deal out of it due to still selling the 2018 models and maybe further ticking off the cold weather problem owners?