OK, how about this, then?
DHL collect your bag from your home the day before travel. You then take personal transport (public transport or your car) to a designated satellite area remote from the airport, pass through security on to a bus. Whilst on the bus someone comes round and reads your ID (passport or ID card) to confirm you can travel and are boooked on the flight. The bus takes you DIRECT TO THE AIRCRAFT. You walk up the steps of the a/c along with the rest of the busload. A/c departs. At the other end, bus takes you from a/c to remote transport node for onward travel. You arrive at your destination where your luggage is waiting for you. It may have travelled on the same a/c as you, but not necessarily. Using logistics and timed delivery is probably streets ahead of our baggage systems at the airports.
NO BUILDINGS at the airport. Just proper stands and manoeuvring area.
We were using remote check-in and bussing to the a/c 50 years ago - anyone remember West London Air Terminal and those BEA buses with 1 & 1/2 decks and the baggage trailers?
What goes around, comes around...
Cheers,
The Odd One