Any critique on Uber's use of Triggers for triggering billing service? I have been reading that Triggers shouldn't be used to esp, call external services as, th

Any critique on Uber's use of Triggers for triggering billing service? I have been reading that Triggers shouldn't be used to esp, call external services as, the external service might not be ACID compliant(no rollback?) and if expensive, they can hold the DB lock on the row for really long time.