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It's very likely (centralized) hubs will emerge: you open 1 channel with the hub, and the hub has many other open channels. Say Bob <> hub <> Alice, or Bob <> hub <> exchange <> Alice.
As long as you don't close the channel, you can keep using it without paying on-chain fees.
Thus conflicting one the foundations of Bitcoin, decentalisation? After 10 years, we've reinvented the Bank.