[aces]

Respectfully I disagree. I think facebook did the right thing by walking away from email in its current form. I think subjects in messages are no longer needed and just because there are mismatches between the different systems, doesnt mean an attempt should be made to unify them.

Just looking at this long term, one can see that facebook will likely try to push their interface as a standard communications interface to everyone that you want to reach (business or otherwise) and ultimately let users choose how they can be contacted. This has far reaching implications for a product trying to reach their customers. Maybe they will even break this out into a paid product for businesses to reach their customers, who knows. Theres alot that can be done with a system like this. And im surprised it took so long for someone to do it. I believe the market has been begging for something like this for a while.

[polynomial]

> I think subjects in messages are no longer needed

Full stop. While the messaging landscape is definitely changing, the notion that the subject field is now obsolete seems extremely premature, to say the least.