[macspoofing]

> "Making a car is expensive, so let's not do that to explore 1000 miles out. Let's just have 1000 people walk one mile and explore."

"Making a car is expensive, so let's not do that to explore 1000 miles out. Let's instead build an airplane."

The problem with next-gen LHC is that there are no guarantees of any new or interesting physics for that $100 billion. And particle accelerators are not the only way to spend large sums of money, so there is an opportunity cost. Why not spend that $100 billion to build more space telescopes or more sensitive LIGOs to detect gravitational waves, etc.