I hate doing laundry on vacation, so on long trips, I normally do a 25" checked luggage and a medium-sized backpack. A good quality roller bag is easy to wheel around, and I can carry it if I need to.
If doing laundry ever became less of a hassle, I could pack less, but I sweat, and I am not wearing dirty, sweaty clothes all the time.
Also, our trips almost always include some fine dining and some hiking, which complicates it further.
I also have more liquids than I can fit in a quart-sized bag, so unless my husband is with me or I am going to my parent’s house, I check my luggage.
Yes, and they seem okay in a pinch, but not a real solution. The reviews say it takes 15-20 minutes of labor just to do a few items. And you can only do like one pair of pants at a time. With ringing everything out and hanging everything to dry, it would take many hours to wash 5 days of clothing for 2, and then days for it to dry. I would still rather pack more than do that.