Team reminders now default to the appointment owner only

Previously, appointment reminders for your team were sent to the appointment owner and everyone in the calendar's "Additional Team Members to Notify" list. For many teams that meant extra people getting reminder texts and emails for appointments they weren't running.
What's changed:
Team reminders now go only to the appointment owner by default
A new option in Calendar Settings
 > Notifications
 > Team Reminders
 — "Also send team reminders to the additional team members listed above" — lets you opt back in to reminding the full list
Booking confirmations and cancellation notices are unaffected: additional team members still always receive those
How this applies to existing appointments:
 reminders are scheduled at booking time, so appointments booked before this release keep their already-scheduled reminders — additional team members will still get those. 
The new owner-only default applies to appointments booked (or rescheduled) going forward. 
To keep the old behavior for future bookings, just enable the new checkbox on that calendar.