Friday came instantly afterwards she was just there as a change of voice and personality
Also if you watch what if… the German one is VERY much not an “upgrade
Jarvis was a catalyst for the big branch of ai's Tony's developed after him, That was only one of his entire library as there ones that aren't used in the franchise as there are other ai that are literal embodiments of Tony stark himself.
There is also an ai that has zero personality no sentience straight to the point with no personality and speaks in binary and you say their all the same.
There are other thought processes besides sentience. Why are you so inclined into believing ai is supposed to have emotions when ai that tony stark used like B.O.S.S never had any emotions and still gave out directions and options just like any other ai tony stark has used.