I think the author needs to look into NFTs more closely before making a judgment like this. With the sole notable exception of NBA TopShots, which is on Flow, a

I think the author needs to look into NFTs more closely before making a judgment like this. With the sole notable exception of NBA TopShots, which is on Flow, all prominent NFTs are currently issued on Ethereum. Ethereum's energy consumption will massively decrease in the near future as the long-planned switch of its consensus algorithm to one based on Proof of Stake is implemented. Ethereum's Proof of Stake Beacon Chain launched in December 2020 and has worked smoothly since then. The launch was the first of the three phases of ETH2, by the end of which Ethereum will be fully reliant on Proof of Stake - with no dependence on energy mass-consuming Proof of Work - and be massively more scalable. The author's criticism aside and on the subject of the nascent NFT market, I hope in the future multiple MMORGs recognize NFT sets and allow players to unlock certain digital items, traits or characters by proving ownership over an NFT within that set. Being able to migrate digital assets across virtual worlds could lead to the emergence of a global cyber culture with universally recognized digital cultural items.