Is There a Multi-Ethnic Empire in C K 3?

The latest crusader kings three expansion moved more decisively towards that, you know, ethnicities in your empire don't now just sort of poof out of existence over the next 50 years. And there are systems to make it more possible if you want to run a multi ethnic empire. It is striking, but probably appropriately correct, that you you can make a multi ethnic kingdom work, but you really can't make a multi religious kingdom work,. Ya, multi religious kingdoms, who are hard. Ah, and i thought that was really, that is really interesting. I mean,  i guess it's all paradox all the time.