I try asking again:
Did you also try larger prints yet? If so, how do you like them?
In my region it is also with larger prints cheaper to give them away instead of printing it on my own.
The main problem is the ink. I do print not very often. The ink will dry before my next print. I risk to damage the printer beside the costly exchange of inksets.
Therefore even if printing A3+ would be cheaper for me in theory by numbers, it would be more expensive in the long run in real life.
If I would print 20 images per week instead of 5 per year this would be different of course.