I never thought before the years end we could be seeing NFTs from other blockchains. But there are many of them already and doing good. Like BCH has juungle, waifu etc. Solana too has got into this and there will be other blockchains following suit. You can check out the art based NFTs on Solana here: https://solanart.io/ Have you tried NFTs outside Ethereum and BCH? What's your experience?