You know, I was skeptical at first but there might just be something to this whole car-updates-firmware-at-service-center deal.
My experience is as follows:
1) Been on 2.20.30 since May 27th, so over a month and no updates or even update notifications since
2) Dropped off my 2014 P85D at the Burlingame service center on Tuesday, June 28th morning for the Ludicrous upgrade
3) Got an notification last night, Wednesday June 29th at 7:15pm that a software update is available
I know they haven't touched the car yet because it's just been sitting on the lot next to the SC building, and I'm not sure whether it's on WiFi or not but it sure seems like software updates while at a service center is not a coincidence in my case!