Agree, a module with 1wire master DS2482 or DS2484 connected via i2c would be nice.

Similar to other Proto modules for the stamp form factor would be gerber files (for easy prototyping), plastic shells with the screw and the threaded insert enough, so anybody can build his own nice looking "stamp".

Adding it here as well as it is better trackable/searchable as on twitter.

A CAN module similar to https://docs.m5stack.com/en/stamp/stamp_pwr485 with an integrated DC-DC and the same pinouts would be really handy.

LEDs for IOs are standard on any PLC device. Display is good, but a simple led is better as it always works regardless of a software.