What he said ^
For years I used a Travelpro Crew 22” until it started to fall apart (only had 5yr warranty in those days) then switched to a B&R 21” plus my Swiss backpack for the laptop. I often go 14 days and do hotel laundry 1-2x. I can fit about 5 folded dress shirts, 2 slacks, 1 blazer, shorts, dress shoes. On the plane I’ll wear jeans. As noted above winter is a bit tougher but will carryon a long winter coat. Even more challenging when I have Africa and Europe in January. But it can be done.
Fortunately my employer pays laundry which is $$ well spent as I have many horror stories about others who lost checked luggage. My motto is “never check” on biz trips. I use the same suitcase for 2 nights or 2 weeks - just easier that way as they are fully stocked & ready to go.