Well, I use MMS'es extensively, on the average sending/receiving maybe 5 messages per week.

During "The Mighty N900 Week 2016" when I reverted to my trusty N900 I ended up missing some messages that I really would have liked to receive

There used to be a feature with my operator, that if a MMS was sent to a device that does not support such beasts would store the message in a network server and instead send a https link as SMS to the recipient. I thought it would still be available but seems it has been dismantled a long time ago, probably due to all devices nowdays supporting MMS'es...

I clearly remember using that service, and am quite sure it was available about 10...11 years ago. However when I called my operator the helpdesk had not even heard about such a thing and when I insisted, he called some senior helpdesker who vaguely thought he had heard about it "really long time ago in the past, before my time"
Pity they only have youngsters with no sense of history on call...