Smallest bag

Been doing the one bag travel for years now, trips are usually 2-3 weeks+, couple different countries at a time. Always used the TNF Recon 30L however I think I can go smaller so I ordered the Peak Design Everyday Zip 20L.

I always take my DSLR (Canon 90D) which takes up a ton of space, and clothes go in my small Peak Design compression cubes, 2 for cold climates and 1 for warm climates. Chargers etc go in my Eagle Creek Pack It mini. The rest doesn't take up much space.

My plan is 30L for colder climates, and 20L for warmer climates. I'm excited to try just a 20L, I think I'll still have extra space for souvenirs and/or a rain jacket too.

Anyone use a bag this small for multi-week international trips or am I crazy?