I heard BOS737 MAX10 (from a CPO) about a year ago....apparently even though it will only have 180 seats (same as current 737-900), because it will have more premium heavy seating layout, that is what network wants in BOS.

There is at least 15% more 320 departure a day out of BOS right now than there was back in 2020 when they had announced BOS 320....so it is made sense then, I don't see how the numbers don't make sense right now.