edX.org is starting to plan our Mongo 3.6 to Mongo 4.0 upgrade for next quarter. While there are a handful of breaking changes with the upgrade which you can read about here, nothing stands out like it will impact application code for forums or modulestore.
The most notable change with this upgrade is actually the license change made to prevent SaaS providers like AWS and other from offering their DB as a service without paying any fees. This means if you are using a mongo SaaS provider today they will likely never upgrade beyond the 3.6 apis. So I wanted to highlight that now and see if there are any concerns and/or other conversations we should be having around this topic.
Is anyone running on MongoDB 4.0 or greater right now? Any tips to share?
Is anyone running on a SaaS provider right now that only offers 3.6 compatibility?