I think it’s reasonable to expect the model Y is such a high priority given the sales volume will probably be enormous. I’d predict there best selling unit easily given price and convenience of a small suv/crossover format.
It also depends on how the Roadster reservation goes. With so many opportunities Tesla needs to use its scarce resources wisely. The less negative impact on cash flow Roadster has the better chance we will see it made sooner. That's one reason I'm staying with my reservation.