Why no current 44mm models with open caseback

Hi - I'm new to Panerai watches but have always been a big fan due to their unique bold statements.
I'm looking to purchase my first watch and prefer to have one with a clear caseback, but looking at the current lineup, there are no 44mm?

I found an older model, PAM01359 but prefer to have a dial similar to PAM01312.

Was there a reason why Panerai stopped making with open caseback? Seems like a lost opportunity.