A lot of apps may naturally wind down on the PoW fork, especially those that rely on assets that cannot just be "cloned" between the two branches of the fork, e.g., all the stablecoins etc. But there is nothing preventing anyone from continuing to mine (that's a feature imo). If the native asset of the PoW chain isn't listed or isn't attractive though, the chain may not be secure
Is there anything to stop the miners continuing to run the POW eth 1 chain after eth 2 is launched?
A lot of apps may naturally wind down on the PoW fork, especially those that rely on assets that cannot just be "cloned" between the two branches of the fork, e.g., all the stablecoins etc. But there is nothing preventing anyone from continuing to mine (that's a feature imo). If the native asset of the PoW chain isn't listed or isn't attractive though, the chain may not be secure