Hi John,
Mongo upgrades aren’t currently on any roadmaps, but it probably should be. We’ve been neglecting to upgrade because we haven’t been having any issues with 3.2 and we’ve been too busy doing other things. The main blocker is upgrading the drivers, mainly pymongo on all the python apps, and whatever forums uses. I’d like to get us up to at least 3.6 since that’s the version that AWS supports in their hosted offering.