The value of compatibility hinges on the savings. If we're talking about $100, yeah, I can keep my old PS2 around for when I am Jonesing for some Wipeout action. If we're talking $10, then I'd prefer the convenience of one machine in my living room.

Let us take 9 "quantum pairs" (honestly, I don't know the exact terminology of them). You have 9 of them on Earth (A) and 9 of them elsewhere (B). They are ordered from 0 to 8. Assuming that you can determine when the quantum waveform collapses into spin up or spin down, you start the communication when A0 is caused to collapse. Instantly B0 becomes up or down. That's the start of the communication. If after 1 ms, B1 is found to have collapsed into an up or down, that counts as a 0. If after 2ms, B1 is found to have collapsed into a up or down, that counts as a 1. You would be able to generate a byte of data this way.

So start-2-1-2-1-1-1-2-1, would be 10100010.

The point is that it doesn't matter whatever B0 to B8 end up as. Just when they end up as an up or a down.

Are you going to be able to determine whether the waveform has collapsed without collapsing it yourself.

Of course, I didn't sleep last night. My guess is that if you are in a position to determine whether or not the waveform has collapsed, you will collapse it yourself. Maybe there's an indirect method.

As far as matter transportation, I wouldn't rule it out as impossible. I certainly wouldn't say it's inevitable. When quantum communication is studied in greater depth, some inconsistencies may be uncovered which could lead to a "greater truth".