I can make a week with my carry on and personal pack. Haven’t checked in luggage for awhile, and our carryons are a hair smaller than the limits.
The jacked up prices for checking bags have been great for me to simplify what I bring.
You can wear the same outer clothes and pack plenty of underwear/socks if you're just lounging around and if something really needs to be washed it's not like a laundromat or similar isn't nearby.
Have they started charging for carry on since many people are doing similar? I'd guess that's next.