This obviously wouldn't be Bitcoin anymore, and no way is any miner ever going to support this. Not to mention the amount of botnets that will hop onto this bandwagon.

Unsafe without Segwit, although I like the idea of adaptive block size algorithm with an lower and upper bound (as long as the upper one isn't beyond safe limits).

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I have no idea why they want this to be associated with Bitcoin when it clearly isn't Bitcoin. I'll take a wild guess: Manipulation.