ERROR and WARNING log levels. Everything goes to ERROR by default, some errors get downgraded to WARNING when you confirm they are not important. Send ERRORs

ERROR and WARNING log levels. Everything goes to ERROR by default, some errors get downgraded to WARNING when you confirm they are not important. Send ERRORs to Sentry (or whatever you use) and deal with them immediately. Send WARNINGs to your favorite centralized logging solution and deal with them when there's too many.