"We have different examples, but let's take a few, Binance Smart Chain, supposedly compatible with Ethereum is a mess (or FTT/FTX token, see Collapse of FTX and others: the Fxcking Token Theory), and Stacks for Bitcoin supposedly allowing "smart contracts" and NFT on bitcoin is the same, both centralized, insecure, making it difficult to swap the tokens between one chain to another" https://gist.github.com/Ayms/01dbfebf219965054b4a3beed1bfeba7