How we could use demurrage fees as transaction fees and what benefits this would bring:
Theoretically it would be possible to use the demurrage fee as transaction fee.
This could look like this:
In an given block a part* of the block-reward is assigned to transactions as additional paid fee*** according to how much demurrage they pay (similar to coin age the transaction destroys).
This could be implemented as soft fork.
This would help also to reduce that transactions get stuck because of not paying enough fees.
As benefit this would also increase temporal