If you can afford an end game strider, you can afford more units.
What are you going to do after the thing is done? You had to have alot of eco in order to even build it, now they can be turned to building an escort.
I'll paraphrase what one of the good players said to me in a game.
"Units around 100m each are what the game is about. Those that cost more than that are meant to be used to give you an advantage so you can employ your 100m units. "
Frankly, without a certain base number of units, you don't have strategy. There will only be battlefield tactics and micromanagement if you have <10 units.
In my opinion as a not-so-good player, the game appears to be about positioning and out-thinking your opponent, not about building the biggest unit in the field.