The hatred and fear of Mongo is justified. That doesn't necessarily mean you need to switch right now.
If you're just using a document DB instead of a relational DB, you won't have a hard time moving away from Mongo. There just isn't that much to learn.
Even better, there are various databases that actually have Mongo compatibility[1][2], but internally will be more reliable and scalable.
If you have the dev bandwidth, look into switching now and maybe give it a try in your dev environment.
2. https://docs.microsoft.com/en-us/azure/cosmos-db/mongodb-int...