I've learned ot be careful with my vehicles. I as well, don't have a problem with getting the vehicles I want...most of the time.
But let's adress the biggest problem most of you are missing
Ahem...the more territory you have...the more resources you receive...the more vehicles you can produce...
In real combat, the ones with endings, this is a fine and expected.
I indeed played on a server when we got pushed back nearly to the warpgate with no acess to the tank producing resource.
We were camped relentlessly. In ps1, it didn't matter, the pops were what made the difference.
As the system is now, all it's going to take is one good push and an entire faction will not be able to leave their "sanc".
This is the biggest issue that needs to be adresssed. Not the fact that some people don't know how to manage their assests.