I shouldn't be one to talk, as I still use TRS2006 ...
But when TS09 came out I said: "Eenhh" ... I'll do without that version" ...
Then shortly thereafter TS10 all too soon popped up ... and I bought that version ... never installed it, nor tested it ...
Then TS12 all too quickly popped up ... And I said: "Oooohhh ... Gotta have that" ... and I bought that version ... I only touched the surface of testing TS12 ...
Then T:ANE popped up, and I said: "WoW ... Gotta have that" ... And I bought that version ... I have barely tested T:ANE out
I still use TRS2006 as my main route building program, as it is so easy to use surveyor, and NO layers
If I had TS09, I would not even think of using it, as it is a prematurely rushed out version of TS10
I'll always be using TRS2006, as it has never failed me in build 3337 SP1, and it has always worked absolutely flawlessly ... even though many people have said otherwise, that TRS2006 totally socked for them