Something along those lines is on the agenda: Storage of individual bookings (experimental)
But it’s a whole lot of data and if one wants to be able to actually analyse the data (as in: formulate ad hoc, dynamic queries), it required a bit of engineering effort to make it work. Mind you, AirlineSim is a game. We already burn a sizeable share of our monthly revenue on hosting because running the ORS/DS requires a lot of compute. We can’t simply tack on (for example) another specialised database to analyse hundreds of millions of booking records.