Many years ago, Larry Littlefield (IIRC) thought that the MTA would reduce frequencies everywhere down to 15-30 minutes and the city would encourage more bicycling to offset the issue. If the bus system were to become free, I could see your "superroutes" becoming a reality with a 40% articulated fleet.
100%. That's my beef with most transit supporters. They do not understand that the less they pay for the buses, the less buses they will get. That does not mean they have to pay 100%, but 0% means that the bus funding will be subject to the political winds or fluctuating streams of money.
In a free bus system and a paid rail system, we become WMATA overnight in terms of demographics. Outside of Manhattan, the class divide on the subways is not that strong today.