It is possible to buy clothes at the places one visits. People on a budget can buy some clothes at a second hand store.
Before the trip home, one can donate clothes to a charity in the host country. This will get the luggage back down to size for the ride home.
BTW: The one mistake that I made is that I bought a white towel with me. A hotel owner accused me of being a towel thief because he saw a white towel in my bag.
Clearly, you never read "A Hitchhiker's Guide to the Universe." Douglas Adams said: ""A towel, it says, is about the most massively useful thing an interstellar hitchhiker can have."
He is the authority on the subject.
I have stayed in ruddy hotels with ancient disgusting towels and I was glad that I had a towel. Although, I admit that, for the most part, I take a towel because Adam's asserted that it was the most useful thing a traveler could have.
It is better to have a patterned towel because the hotel proprietors are proprietary of white towels.