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Using just the $HIVE example, there would be considerably LESS value overall without the use case being demonstrated through Layer 2 incentives. They 'power' the growth cycle of the parent.

Without a doubt. There is a limitation to just the transaction/ledger layer.

Smart contract change that but bring scaling issues. Hopefully Hive can solve this with layer 2.

While I believe there needs to be some (conisderable?) change in the overall business model, the implementation of additional Layer 2 resources will be interesting to watch.

There is a lot of potential. Yes I agree it will take some time.