With SV2 or DATUM, miners can choose their own block templates while still using the pool for payouts, so they don’t need to build their own pool. It's about what do the people with machines want: just payouts or they also want to control over the block templates. If it's the latter, they vote by only choosing the pools that provide necessary measures for this. Other pools lose share and slip into irrelevance or move along the lines dictated by the demand.
I am afraid the people with the machines do not care or outright do not want this. That's a bigger problem that awaits any coin that goes big. The final boss: deep pockets and infinite cash.
