This has been re-hashed to death. Do a search for all the arguments.

I fly dual rxs on all my research planes (20+) valued from $5K to $15K. I have survived all types of component failure with dual rxs without losing the plane. For me, it is a no-brainer . . . . .

You can either carefully prepare your plane and fly carefully and hope your single rx does not fail

Or

You can plan for failure by carefully preparing your plane with dual rxs. The probability of total failure is a power of 10 less with dual rxs.

Elson