I had an electric fuel pump failure at a hill-top strip, with high winds forecast. I flew the aircraft to our homebase, where it was not flown again until it was repaired. (20 minute flight.)
I have twice had post-maintenance problems with the mechanical pump, detected on climb-out. In both cases, although the engine worked normally with the electric pump on, I immediately returned, and did not fly until problem was fixed. In one case, fuel was pouring out of the pump.