On the contrary. Increasing density within the core allows people to switch to walking, cycling and transit. It reduces road traffic and those who want to comm

On the contrary. Increasing density within the core allows people to switch to walking, cycling and transit. It reduces road traffic and those who want to commute from the burbs gain a faster commute. New housing isn't zero sum. Increasing housing in the core doesn't reduce housing in the outskirts. The new Caltrains are a good model for transit as a valid mode for suburban commuting. A table, chair and wifi allows commuting to be a productive period to get work done. Boston's commuter rail & NYC's LIRR routes are also excellent, though they could use technological (wifi, charging, tables) upgrades. It doesn't make the commute shorter, but allows you to leave early and continue work on the train.