Exactly! For myself, if I were to purchase an M1-based Mac now, I would NEED a Thunderbolt 4 "hub" with various ports on it. That's because I still have a USB Mouse from Logitech, an external USB-connected SSD for my backups, and my new Samsung T7 external 1 TB USB-C/Thunderbolt 3 SSD, And that is what I would need to BUY.
M1 Macs have two USB 3.0 ports which should take care of your Logitech mouse and backup drive, and two Thunderbolt 4 ports so you can connect your Samsung T7 and still have one to spare and you would have no need for any other external USB or Thunderbolt port or hub.
