You should rent a latest 3/Y for 3 days and then make the decision.

The difference between them are subtle but massive. To the point, I will say a good amount of Tesla owners complains about build quality are fully on point.

On the other hand, those same people will be pleasantly surprised if they try out ~2025 models.

I own both. To an external eye, latest Y just has lightbar and more space. But only when you use it, you notice the QoL improvements. I rarely drive the M3 even though it is the more "fun" car...

As for turn signal stalk, it is present in Y. and newer 3 as far as I know.