I go the calibre route as well, I have the cheapest basic kindle it is super light and very small I can even fit it in most pockets.
I really enjoy the curation of a bookstore so I usually end up side loading an epub of my physical purchases. I’ll typically switch back and forth I just finished “The Way of Kings” the hardcover was gigantic and unwieldy at times but the maps were so much better than the kindle version.
I enjoy walking through bookstores and libraries I could get lost for hours