Just as said in the title - there is no reason for this limit. We are using a highly modular FileMaker solution and use a lot of databases (and different versions of the modules - small, large, customer specific) and have to set up server after server just to be able to host these.
It would be much easier if you were to remove this limit. Might be bound to the resources of the server - (core count, RAM amount or what else)
(and sorry if this was already asked in the ideas forum - i didn't find it yet, just in discussions)