One great example of Spring RTS being used in a game is Beyond All Reasons, A Open Source RTS: https://www.beyondallreason.info

> All units and projectiles are simulated in real-time. The game offers fully simulated projectile ballistics, explosion physics and terrain deformation.

> The shape of every battlefield in-game imposes which strategies work and which units are effective. No two maps will play the same. Radar cannot penetrate mountains and nuclear warfare will physically alter the terrain.

Unexpectedly fun game.