Mycroft
Cargo aircraft do still not require TCAS for operations in the US (North or South!)
Aircraft that do operate in EU do of course have to install it. So still lots of large lumps of aluminium flying around incognito !!
You really have to wonder at the FAA attitude (bearing in mind they are chartered to promote "safety") how they can possibly condone this. While at the other end of the scale they are pushing for it on puddle jumpers!!!
EU now require TCAS mop7 which is even higher standard than FAA mandated systems required in the US.
Nice level playing field !!!