Soft-QCD and UE spectra in pp collisions at very high CM energies (a Snowmass white paper)

We make some educated guesses for the extrapolations of typical soft-inclusive (minimum-bias, pileup, underlying-event) observables to proton-proton collisions at center-of-mass energies in the range 13 - 100 TeV. The numbers should be interpreted with (at least) a 10% uncertainty.