One thing that EV's have an advantage of is the reduced footprint of their drivetrain. The primary bulk of an EV is the massive battery that usually spans the bottom of the car opening up space in the interior or the ubiquitous EV "frunk" this makes for a more spacious interior and the Y takes advantage of this well.
That being said it seems that 2023 is the year of the EV, my family is currently in the market for a new car and have been pleasantly surprised at the breadth of offerings.
I can't really make up my mind on whether the fact that the model Y is the "best selling model of car" is something to hang your hat on these days. It's a great metric, sure, but it's been in a somewhat limited market. On it's face I can see it's appeal - size, space, EV, extra seating - its NOT A MINIVAN. But it seems like a fairly easy moat to breach. One thing about the Corolla was it's build quality was top notch it was a solid, reliable car and it seems more and more lately this isn't a hallmark of Tesla. I wouldn't be surprised for the model Y to keep the mantle of "best selling model" - particularly because of Tesla's lead in its ability to manufacture electric cars and the surface appeal of the model Y - but I wouldn't be surprised if it lost this lead as well.