And yet amazingly, I can get most of that into the set-ups I posted pictures of above.

That does vary from trip to trip depending on where I'm going ... and it may be a situation of, "I can wait until I get there to buy that".

For example, we did that with our current tent. In 2007, Rowan lived in Australia and I lived in Canada. Rather than trying to go tent shopping online, and rather than carrying a tent to Europe with us, what with baggage restrictions and all, we met in London, cycled down to Dunkerque, stopped in at a Decathlon and bought a tent there. Then, IIRC, it came home with me because I had the better baggage allowances.

I also mention jerseys on there, but I've got them greyed out. I used to bring 1 or 2 jerseys, but I don't anymore. It's lighter and more versatile to bring wicking Ts instead. I'll do a rotation of 3 wicking Ts. One on me while I'm cycling, one for after the ride, and a clean one in the bag. I might wear that 2-3 days in a row, then the one I'm wearing while cycling becomes laundry, the one I wear after the ride becomes my ride T, and the clean one is the one I wear after the ride. 2-3 days like that, and the one I'm wearing while cycling becomes laundry, the one I'm wearing after the ride becomes my ride T, and I'm looking for a laundry at some point that day.