>85% ran software with known security flaws. That includes 527 older controllers Danfoss no longer supports. Only 195 had every known fix.
As long as the fridges are used the controller has to be supported.
This isn't a raspberry pi $50 a pop...
Things will only meaningfully change when insurance companies stop paying out when reasonable steps weren't taken by companies to protect themselves.
Oh, great idea. We should do that for software: force manufacturers to support their software with bugfixes as long as it is in use. And just bugfixes, the marketing department can stay out of it.