Things change with time (thank goodness), the past will always be different from the present regarding Christmas and everything else, and the future will be different than things are today. Not a bad thing at all.
There might have been undecorated Christmas trees available when I was a child, but likely were expensive so my family would not have bought one. My father usually bought a small real tree the day before Christmas without my knowing, my parents decorated it and put down the gifts that night after I was asleep. In the morning the tree was lit when I woke up and it was magical. My older brother and sisters probably helped, but for me, I was unaware.
Everybody wrapped gifts, there were no gift bags sold, or they would have been used by some. We had no computer, so no option for internet shopping (also didn't use credit cards then), we did what was usual for the times. Although my mother did all the holiday cooking for us, I never recall her baking pastries or desserts, she bought those from a bakery for any special occasions.
Kids today don't realize what went into holiday prep 50 years ago because they weren't alive then. They're just fine living in the present and not the past, IMO.....it's all good!