When I travel, I bring one 30W USB-C charging brick and a 2m USB-C cable, in addition to a Dell battery bank that has a short integrated USB-C cable. These charge my phone, laptop, iPad mini, and Nintendo Switch. At home I have a dedicated 45W charger for my laptop, but the 30W charger is much smaller and works just fine.
Unfortunately, I still need to bring a 6" microUSB cable as well, because my Logitech mouse, bicycle headlamp, and pocket flashlight (that uses 14500 lithium batteries) still don't have USB-C ports. I plan on upgrading all of them to USB-C when I can, but these rarely need to be charged so it's not as big a deal for me.
Unfortunately, I still need to bring a 6" microUSB cable as well, because my Logitech mouse, bicycle headlamp, and pocket flashlight (that uses 14500 lithium batteries) still don't have USB-C ports. I plan on upgrading all of them to USB-C when I can, but these rarely need to be charged so it's not as big a deal for me.