There's also Switcher, part of the
Krokodove plugins (Resolve/Fusion Studio only)
This has the potential performance advantage that it's written in C or C++, rather than a Lua Fuse. It has the downside that you can't see all the connections to it in the UI, only the first one. You have to enter the rest in the Inspector (or drag & drop the nodes there):
Though this could also be a benefit in situations where you have lots of input nodes, especially if they're spread out throughout a large comp, which could cause the pipes to get messy.