Why can't they just get along?
.280 - will you promise to not start outselling the .270 and drive it into obsolescence?
.270 - will you accept that some gun loonies, being loonies, won't listen to arguments about popularity, ammo availability, standard pressures, yadda, yadda, yadda, and just want something different?

Oh, and 30/06, please let the little guys work this out alone.