Switching DB's does happen, but it is generally rare in my experience, and usually a strategic mistake. Those who do it usually underestimate the migration time

Switching DB's does happen, but it is generally rare in my experience, and usually a strategic mistake. Those who do it usually underestimate the migration time. It's not economical to spend a lot of time up front to prepare for a scenario that happens once in a blue moon. The main reason to write mostly generic SQL is so new hire-ees can get up to speed.