Sorting toys is a mug’s game, especially when there are a lot. Makes sense for some things that go together like LEGO, but how do you even decide how the rest goes together. Size? Material? Whether they get invited to the tea party? Randomly in boxes seems fine to me.
One piece of advice is if you have someone who gives large toys even after being asked not to, you are certainly within your rights to ask that the toy stay at their house.
Sure, you know what your kids going to tell you a decade from now? It’s abstract now, but there are so many variables. If they struggle making friends, it’s the first time they’ve invited people over and they want it to be just like last time at another kid’s house which they all thought was cool? It’s a tough call.