The Tech Center is a vital building that is required to use any of the advanced units. If destroyed, it will freeze all advanced units for 15 seconds. The Tech Center does have some good support upgrades that increase gold and rare drops.
Zava Detector: +5% chance of finding rare units (1 level)
Gold Generator: Generate 150-600 gold every 10 seconds (10 levels)
Terra Alloy: +15-150 hp (10 levels)