Model Y premium RWD 4680 battery?

Would you buy the Tesla Model Y Premium rear-wheel drive? It seems that the range changed from 622 km WLTP to an estimated 603 km, which could suggest a change to the 4680 battery — do you think that’s risky? Best alternatives for a family of 4? I’ve looked at the whole market and in terms of space at that price I can’t find anything better. I’m concerned because nothing is known about what the batteries will be like or how they manage charging; they could be much slower compared to LG batteries. Thank you for your replies.