... how long do you think Canon will support the now obviously dying EF System?
For a long, long time. You think Canon is suddenly going to stop supporting the millions of Canon DSLR's out there, plus all the pros and companies that have spent tens of thousands of $$$ on EF gear? Think again.
Posts that proclaim the sky is falling (like this thread, ironically), make me laugh. The "DSLR Doom and Gloom Gang" has been saying that DSLR cameras are going to be dying or dissolve into just a memory, for many, many years now.
Now please, do move on. No need for useless speculation.