Huh. I had a client once who complained that I was adding database indirection layers to some application. "When are we ever going to change databases?" I had

Huh. I had a client once who complained that I was adding database indirection layers to some application. "When are we ever going to change databases?" I had to remind him that, in the few years I worked for him, we had actually used five different databases - MS SQL, VistaDB, Excel-as-a-database (using ODBC), LiteDB (a NoSql database) and Sqlite. He knew about each and everyone of those, but the "we're never going to change databases" reaction is so ingrained apparently that he just went with it. And just in case you're going to argue "sure, you used different databases but in different applications" - I just had a programmer change Sqlite to LiteDB, because Sqlite wasn't working properly on his system and it was faster to just change the database.