X2 is also closed for a refurb. When I rode Viper I did see a train outside of the station, not sure if the other one was in the station, but there was some activity going on.
Roller coasters are supposed to be scary. That's their raison d'être. But not all coasters are created equal. The two scariest roller coasters in the US are Kingda Ka at Six Flags Great Adventure and Top Thrill Dragster at Cedar Point.
As rides closed until Memorial Day weekend are Medusa, Runaway Mine Train and Log Flume due to staff issues or El Toro's retracking progress. I think they might also do construction for 2024 new coaster next year to demolish old concert area behind Medusa.