This may be a limit in my understanding, but I don't get what ya'll mean. The miner incentives should be the same as today, the payout will just be tiny, which might still be a lot of value if Bitcoin gets extremely valuable over the next 100 years. Shouldn't matter what the custodians or whoever are doing, miners will be taking transactions and offering the highest fees. Us plebs will still have nodes, and will be watching. On chain Bitcoin will just be far too expensive to use for anything other than huge sums, everyone will be down in the layers.