Messaging record limit

I’m building an app that important part of it will be messaging between users.
I can see few posts here on the forum that there are record limit in the database.
Messages record will be build very fast. for every user probably hundreds of records, this is not sustainable if there is a 50k limit on the database. is there a limit?
I think using external database will be a problem for messaging as the collection have relationship with other collections.
Maybe use external database for other collection also?
Maybe create some kind of archive collection for messages?
Anyone have experience with that?

Thank you

Any one?
Is there a record limit in the database?
@Colin maybe you know?
or maybe you @Ben know?
Thank you :slight_smile: