"something that will keep Larry's yachts afloat awhile longer" - great line
I sort of expect Larry to join John McAfee trolling the beaches of low regulatory countries fairly soon. Birds and feathers.
Microsoft will be including free support for Java with SQL Server 2019 in a move that involves a little shade thrown at arch-rival Oracle. Java in SQL Server is nothing new – the language can be found lurking in various places around the product, including the interop layers used by the company's data virtualization tech. …
I use sqlite for tiny databases, MariaDB for small to medium datasets, Postgres for large and MongoDB for huge ones
I am quite sure that this is quite common, and some use cases may call for different solutions.. for example if on the cloud you might prefer object storage APIs, and program APIs, not databases.. and, anyway, are you not using spring boot or equivalent to abstract that?
If you approach a typical tie-wearing spivvy salesman working for a typical corporation and tell him you have a requirement for something to crack a nut with, he's going to try to sell you a steamroller -- preferrably the most expensive one in the catalogue, because he gets paid more commission for selling you a more expensive product.
Given that you use 20% of the features 80% of the time, I'd bet a fair number of people paying for proprietary databases would be no worse off with something else. And if you're using Java alongside a database, then the chances are that most of the actual SQL is hidden away behind methods specific to your objects, which in turn are calling a generic database driver; so replacing the database server and thus the SQL dialect should be reasonably painless.
The spiv is always going to try to convince you that you can't live without special feature X that's conveniently present only in the more expensive products, even when your use case doesn't really require it. If you use a feature only rarely, it can be emulated in the application or driver layers; and the slowdown will be less noticeable because it is only happening occasionally, if not masked altogether by a serendipitous speedup elsewhere.
It's about not walking all the way to the tool shed to fetch a chisel, if there is a screwdriver to hand which is up to the job (note the emphasis; you're heading for grief, if it isn't).