Can Thanksgiving be Thanksgiving without pumpkin pie?

I just read that there will be a shortage of pumpkin for pumpkin pie next year. Would your Thanksgiving be complete without pumpkin pie? If you need it but can’t get it, what would you substitute? Personally I have no problem with sweet potato pie, but I have long deplored the shortage of mince pie. If you don’t care for pumpkin pie, then what is your must-have celebratory dessert?