I use Sql-Server on Azure, if you are interested. Connection conflicts with multiple users where an issue but that was due to my inexperience. Otherwise Azure provides a good service, but of course at a cost. As it is a full blown database, it has much more capabilities than I will ever use. I haven’t really scaled it yet, though. I believe that the uplink-server is the bottleneck here. But I will test this, of course.