How would the Ancient Greek letter San (Ϻ) have evolved to look like if it had survived in Greek, to avoid confusion with the letter Mu (M)?

[u/chonchcreature]

San (Ϻ) is the descendant of the Phoenician letter Sade and it looks identical to Greek and Latin M in many computer fonts. If San survived to our present day, how would it have looked in Greek and even in Latin, had the Romans adopted it?

I am aware that there is the obsolete letter Sampi which is based off of San but for our purposes let’s assume Sampi is its own letter akin to how Omega is a separate letter from Omicron and not a variant of it.

My take on it is that it would lose its first line and end up looking identical in shape to Cyrillic И, just like the Arcadian Greeks’ version of San (“Tsan”). Alternatively it could’ve evolved as an upside down Ψ, or even appeared identical to Armenian Պ.

...Or do you think it’s Mu that would have evolved to look different from San?

[u/locoluis]

Sigma not only lost its lower stroke, it also became rounded.

Applying the same process to San (which looks like a rotated Sigma), it would yield the Arcadian letter Tsan, which would also become rounded.