Lee Markum does some thinking:
I was recently thinking of SQL Server temporal tables and how there is a perspective that you shouldn’t use proprietary features of a product because it locks you into that product. I want to be your guide on this matter.
I agree completely with Lee’s take on this. I can count on one hand the number of platform migrations I’ve been a part of through the years. These are painful enough experiences even if you use 100% “portable” code because optimization patterns change. And then you get to the utterly absurd: indexes in Oracle and SQL Server behave differently (e.g., clustered indexes are a practical must in SQL Server and the equivalent to clustered indexes in Oracle is so rarely used that it’s not even worth talking about to most Oracle people), so are you going to avoid indexes so you can have “truly” portable code? If the answer to that question is “yes,” you are wrong.
I do understand that there are companies which create code bases which need to be installable on multiple platforms. In that case, I do understand trying to keep things as common as possible, especially for fairly simple apps. But this is also part of why vendor databases are, as a general rule, awful.