We've had a customer do an upgrade and have had a bit of trouble with a few things being brought through from their old install. Is there any way of exporting the Rulesets and Monitoring associations from 8.6 and importing them in to 8.8? The only way we've found to do this so far is manually with two computer screens side by side and some very sore fingers!
The alerting system has been completely re-done. A "backwards compatibility" mode is simply not possible because it's changed completely from the ground up - it's not been an upgrade, it's been a complete rewrite, so it's back to "apples and oranges" in this case, regrettably.