Solid motor mounts?

So does anyone run solid motor mounts? I remember back in highschool that was the "thing to do", well at least I knew of a few kids that did it and everyone wanted to do it. And thinking of how tight a fit these engines are in these cars and how we are always fighting with clearance issues with headers and manifold especially when the engine is torqued and even putting limiting straps on their engines to stop them from rattling the exhaust, it just made me think about solid motor mounts? So does anyone use em or is that old school or just causes too much vibration or something?