It is indeed not correct. They are not functionally equivalent to their asynchronous equivalents at all - your entire event loop will be blocked for the full du

It is indeed not correct. They are not functionally equivalent to their asynchronous equivalents at all - your entire event loop will be blocked for the full duration of the operation. This may sound like "not a big deal", but even an operation that takes 1ms will cause noticeable lag at ~50 operations per second, and block everything approaching a thousand. For emphasis: they block the entire event loop. Not a single request, not a single client, not a single operation or event. The entire application for every user everywhere.