englisha. I am in total agreement with your last post. All my near misses in the last 20 years have been in VMC whilst trying to maintain the best possible lookout. The reduction of transit space around controlled airspace means one has to spend more time on accuracte navigation, be it by GPS or topo. TCAS systems are a complete was of time against microlights and small flying machines that will never carry such.
I use TCAS in my Day Job and are fully aware how good the system is.