You're shifting the timeline around to fit your narrative that the EU is some sort of boogeyman and this is a cause and effect situation of the EU wanting "...Apple to open up".Pretty confident still. As this is a cause and effect. They (EU) want Apple to open up, and 3rd parties will jump on it. This is an expected outcome for what the laws will enable to happen. And worse.
Before the EU rules Apple could work to shut this type of thing down if it became a problem. Now, the EU wants this type of thing to exist without Apple being able to prevent it or "fix" it. They want them to "make it work".
The solution used by BlueBubbles, Sunbird and others existed long before this and wasn't a result of the EU but rather people wanting to cross-platform a closed messaging service.
Specifically, and by all means technically, why not?If the database was encrypted on the VM/Container, by Apple by default. That only protects the data itself. Not the ability for this process to work.
Others already do.I wouldn't say unfortunately. If they didn't get caught. Others may have tried to use this method without any due diligence as well.