ur, I've flown, say Easyjet, with one checked or multiple checked, and it can easily be half the price of legacy. I always check and go the cheapest, in the past on a route from LGW>RIX BA was much cheaper than RyanAir.

Packing light is quite hard, or ultimately more expensive when you end up buying extra clothes or using hotel laundry service, for long trips or multistop with multiple climates.

too many variables to make sweeping statements.