This is really really massive. They didn't create a better token program that new tokens can use (like Token22), they created a drop-in replacement for the existing one that is 25x more efficient!
Imagine you're running an old Windows 98 Desktop PC and your IT guy comes and upgrades it to Windows 11, swaps out some RAM, new CPU, but your desktop, your apps, your emails, your documents, everything is where it was before, it just works but it's 25x faster.
Every single existing Solana Token (except Token22) benefits from this, immediately and automatically. Tokens power the blockchain, almost every single transaction (except votes) uses tokens.
Insane improvement.