when do you really need async processingtho like when things get slow bc waiting around is a bummer prob when you have

i've been thinking a lot about how to manage background tasks in our applications. we've got several services that perform operations that dont need immediate user feedback, like sending emails, generating reports, or processing uploaded files. right now, some of these are handled synchronously, which can tie up request threads. when do you all find that introducing an asynchronous processing pattern, perhaps with a message queue, becomes a clear win over keeping things synchronous? what are the key indicators that signal its time to switch?