Based on my progress in this game, this stream may contain SPOILERS. Don't spoil changes I haven't reached yet unless I ask.
Depending on my pace, you might be interested in tuning into MegamanNG's playthrough as well, which can be found at • Paper Mario: The Thousand Year Door | Nint...
Chapter 3 Troubles/exploration and maybe a Pit run to B50F. The Strange Sack raised your inventory limit by 10 in the Gamecube days, but will we see that same effect on the Switch?