There are only forty-odd days left of 2019 to collect the required nights and miles with programs that use calendar year for status qualification.
Marriott Bonvoy has begun to send out status downgrade emails to Ambassador members that are unlikely to qualify and offering them a Titanium status, which is one level downgrade.
You can access Marriott’s page for elite statuses here.
Marriott Rewards traditionally downgraded members only one level at a time and sometimes kept members at a higher tier for years, even when they didn’t meet the night requirement (myself included). They had some rolling qualification in place.
SPG, on the other hand, did downgrade members from Platinum to even nothing if they didn’t do the stays or nights required for the status.
Here are Marriott Bonvoy elite levels and requirements:
SPG was very good at (over) promoting the Ambassador service implying that your ambassador is almost part of your family and person that can handle all your travel needs. You could get even points and nights for stays at competing brands in cities where Starwood didn’t have presence (this was a long time ago).
When the program was first launched, it was only by invitation for members that met some criteria such as high spend or whom the program thought was worthy of extra attention.
I qualified when it became official at 100 nights per year and wasn’t impressed even back then, and the service level has only gone down after system integration in August 2018. The Ambassador service is most useful to fix points posting (mis/nonposted at all).