is there a list of real use cases where the async is better than the sync. it seems that it's ok in very edge casees where there's high load and a lot of I/O (

is there a list of real use cases where the async is better than the sync. it seems that it's ok in very edge casees where there's high load and a lot of I/O (example, calling external APIs, calling a db). however, is it stable enough and roboust to replace sync methods in production for the benefit of these cases?