This sounds cocky, but PC players tend to have a bit more, erhm... scrutiny when it comes to console ports. We've been burned for decades on shoddy console ports with little-to-no effort put into them, so the tendency is for PC ports of console games to generally have much smaller sales, so I really don't think there will be that many people playing Sunbreak on PC in comparison to the numbers on Switch.
Besides, my beef still remains how late this DLC is coming, sheesh lol
Sunbreak is a huge expansion. With previous games they used to rerelease it as an Ultimate/G version because of that. Iceborn took longer too, 21 months.