The first day of the month is hectic as we update several fleet models. Here's the first one. This model tracks airline fleets starting in 2020. The model has 12 pages and is quite thorough. The source data is from FlightRadar24, which lists airline fleets. Some noteworthy items: The steady decline in regional jets Boeing's system-wide dominance, MAX deliveries ensure this The single-aisle MoM fleet (page 4) keeps growing In 2020, this fleet was 29.4% and currently is at 32.2% share