Pros and Cons of transferring NFT’s from xDai to ethereum main net?

I’m my eyes the ethereum main net is ‘the real deal’ sort of speak. I don’t know how to feel about the xDai chain. On one hand I like the idea of all my ethereum assets being in one place/wallet but on the other hand the xDai network is so much cheaper to transact on. Does anyone have any great arguments one way or the other? The only NFT’s I have experience with so far is POAP.