[sph]

Modern relation databases are not a concern at all. You get race conditions if the developer has only a passing knowledge of SQL, because otherwise that's a basically solved problem, with the existence of transactions, isolation modes, etc. If all else fails, your query throws an error, but it does not corrupt your database.

Much more common instead are race conditions on local storage, external APIs and traditional memory races when using unsophisticated languages.

[sarchertech]

There’s a lot to learn about transaction isolation levels. I’d bet 90% of developers don’t know anything about them.

Also using serializable isn’t free.