Researchers and devs have been and continue to work incredibly hard to ensure this stops being the case some time mid year 2022.
Most web3 stuff runs on Ethereum, which is the second-biggest energy consumer in crypto. Bitcoin is the biggest and has no plans to move to proof-of-stake, but isn't really involved in web3.
Ethereum's proof-of-stake protocol has been running in parallel for a year with billions of dollars in real ETH deposited, and for the merged system there's a multi-client testnet running.
There's a big difference between "we have a design worked out and think it will take this long" and "we've been running the new system in production for a year, merging it with the old system is relatively easy, and we've got all the clients running the merge together on a public test network." Historically, anything they've gotten to the point of a multi-client testnet has taken well under a year to go live.
2018, it's been 18 months away since 2014.
It's been delayed before, but hopefully it happens this time. I don't own any, but it would be nice for GPU prices to normalize and the environmental cost would go down substantially.
When we're talking about web3, we're generally talking about Ethereum: https://web3js.readthedocs.io