- inability to milk a cow
- inability to chisel messages on a stone tablet
- inability to navigate the seas using only the stars
- inability to light a lantern without spilling the oil
- inability to decipher a message sent via smoke signals
- inability to troubleshoot a malfunctioning sundial
- inability to sharpen a quill
But the comparison of those with the parent's list, as if to imply the parent's items are equally useless or "deprecated", is indeed very troubling...
And that's just a first level comparison, a meta level would include the huge waste enabled by a real-time inter-connected world, over one with limited local signalling abilities.
compared thus, your list is nonsense: a careless slapdash composed in a quick, gotcha-y response to a well-deserved criticism.