Yes it matters what miners want.
I guess you don't follow hyperlinks, or know how to use them for that matter. Moving on...
I think I have read most of what has been written on the subject, including the 2 last years of trilema (and some older articles) + months of logs of b-a.
I have not seen where or how the old bitcoin would survive :
- under a difficulty that matches a target for which it has 5% of the required hashrate
- under the risk of an attacker committed to write empty blocks on the chain as long as it is possible
I do not say :
- that the gigablockchain is a good idea,
- or that a majority of miners will switch to it.
What I say is that IF miners switch, with 95% of the hashrate or more, THEN the old chain is dead. And I don't see any arguments that could explain how it could be any different from what MP himself wrote
here.
If you've read so much of the log and trilema then why aren't you in the WoT? Get on that.
Even if the miners were dumb enough to broadcast the new version and triggered the fork, that doesn't mean they will stay on the fork. They will soon find that it is not possible to sell their USGavincoins for the price they were expecting. And seeing as how mining is a barely profitable venture (due to adjusting difficulty), they will be forced to switch to the original chain or shut down entirely.