BIP 300/301 (Drivechains) Basically programmable and trustless sidechains that uses BTC as a currency. It's such a wonderful concept. It could solve the long-term security budget issue, fight alt coins thus enforcing the 21 million cap, attract even more builders and enable extremely useful feature for you and me. https://www.drivechain.info/
The concept is amazing and it can work. There are many communities in bitcoin and some are against expanding utility and competitivity, under bad pretexts.
Sidechains like RSK are underestimated.
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Really cool. Could you also have a sidechain of a sidechain that is quite a lot faster too?
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You could have a large number of drivechains and even implement their own version version of the Lightning Network on them. I'm not sure about the utility of sidechain on drivechains.
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+1 for sidechains, this is the way
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