Although in reality it could be won and was won many times over causing the map/side change and reset...
Well, speaking of reality it was the map least likely to be won at all. I did track the map rotation several times and it turned out that Trinity, unlike any other map was almost always going the full 7 days. Occasionally we played as much on Trinity in a single month than on all other terrains combined.
The main reason for the difficulty was the 30k mountain layout. It initially made pushing into another country's territory very difficult. Once a foothold was established, it was much easier to continue pushing there instead of capturing the missing bases from the other country.
On V135 and tank town:
V135 was the most active place on the map for sure. But not only because of the attraction of spawn camping, but also because the mountain layout often choked any activity in other places. It also mean that when flying for the south country, any battles could be much harder to find, especially at off hours.
And tank town was not "alive and well" in any way. It was mostly deserted, In later stages often captured completely by 1-3 milkrunning players, 'cause few player even bothered to take a look at it. Sometimes there was
some activity in it, but generally with less than a handful of players from two sides only fighting over a single base.
When Trinity came back to AH after 2 year hiatus, several of us old timers tried to get TT going again. Promotion on all channels and the BBS. Each time we failed, the spark could not ignite the fire again.
In the days of old, an "alive & well" tank town on Trinity meant 40-150 players at any given moment (depending on time of day) slugging it out in the center, the original "tank town". Back then TT was the only place that never stopped to have action, not matter at which time and for which country you were going there. The V135 spawncamp was just a minor sideshow at best.