I think that explains the jobs. Then you have the people who make suboptimal choices, such as buying Oracle today, because nobody got fired for doing that.
.NET divers work great. As for Oracle when companies have been around for decades and rely on it I can see it's almost impossible to change without a huge risk to the business. Bu t if someone were starting a business today Oracle doesn't feel the way to go in most cases. Of course I'm sure they have some really good sales people that make it happen lol
my company uses postgresql and dotnet efcore and it works really really really well. npgsql/efcore.pg is really awesome and has stuff built-in that works. kudos to roji which basically built it (as far as I know does he work for microsoft to bring npgsql forward). but maybe it works equally well, because microsoft bought citus and thus many psql developers.