If the pleb noderunners are the ones who started all this, why would they gradually disappear? From my perspective this hypothesis is similar to email and physical mail boxes. Just because almost the entire world uses email, that doesn't mean that homes are no longer being built with a physical mail box. So, I think there will always be a pleb running a routing node somewhere because collecting network fees is the next step after hyperbitcoinization, and don't forget that You can always sell your Bitcoin peer 2 peer, because that's one of its principle creations. P2P
Discussion
I was thinking from a generational perspective.
When the pioneers are no longer here, what are the incentives for maintaining the culture (and running nodes) if everyday users are priced out of the base layer? (speaking hypothetically as we don't know what the fee structure, but this is a thesis many are talking about)
The incentives from my perspective are maintaining a node which is synonymous with the decentralized ethos of the Bitcoin protocol. If your question is based on a fiat monetary system that might be where I'm not getting your question. Being our own bank is priceless but it takes work, and diligence.