Hi Antoine,

However a risk that the network becomes temporarily unusable does not justify introducing yet another band-aid that would inevitably make it permanently unusable.

Agree.

Moreover, i think we are in a better position nowadays to deal with such a situation than we were 15 years ago when that happened on testnet1.

Yes, I expect some people to contribute some hash rate to unstuck a testnet5 chain (I would be willing to contribute), but I'm not so sure that will be enough.

Anyhow, I gave this scenario some thought and came to the conclusion that the odds of it happening (big miner increasing difficulty on purpose and leaving) would be pretty low.

Yet, it doesn't address the problem of coins getting value (which I still think is unsolvable given a pretty stable network).

Not the biggest concern to me, just that this will be an argument anytime soon.

Edil