Even if they're driving them over, the load out, load in, load out, load in is an obnoxious hassle..
I'm guessing Universal uses the same machine we used at Chinese Theatre to wash them (Regal's was allegedly broken, also they lacked a drying rack, and trays, and... ugh.. I'm triggered by the flashbacks lol)
Also, every land in IOA (except Seuss) has a screen ride: Spidey 3D, Kong 3D, FJ, & formerly Poseidon (technically).