I can only speak for drive chains. The main arguments are:
  • It enables experimentation and new use cases for Bitcoin
  • It solves conflicts and infighting
  • It solves “scaling”
  • It solves the blockchain security budget issue
  • It keeps Bitcoin decentralized
what trade offs do you mean? I have looked briefly into drive chains during my research on prediction markets (Paul Sztorc did a lot of ground work for prediction markets on bitcoin using drive chains) and I have seen no real downside to them except that people are emotionally against the idea because it sounds like "shitcoins on bitcoin" (which is basically a feature not a bug lol)
The misaligned miner incentive problems are pretty big one IMO.
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