You can use the only HWW with native coinjoin: https://wasabi.kravens.nl/#trezor

Yes

Yes, but you are talking about fee rate. Fee is not in fractions of sats

They just ignore it

Exactly. And this could even help with the security budget because on-chain might become even more accessible. It's kind of free money for miners actually.

True

Good joke :-)

But the idea doesn't introduce fractional sats. It's very delicate change than any node runner can do.

This doesn't help with scaling. But it could bring more granularity to fee market and keep it public.

I don't see the problem with the fraction. You still send whole amounts of sats. Fee rate is only a tool to compare the absolute fees. So in the example above, you could relay simple transaction (141 vB) for 2 sat →  0,014 sat/vB

Missing https://vexl.it/ there

Trust is used mainly to build the network.

It's just theoretical concept as of now. And yes it is already quite complex. But it can start simply and than evolve step by step.

And bitcoiners need to go full in bitcoin even before that. Otherwise they fall in Gresham's law fallacy

I think there needs to be demand from paying bitcoiners first

Fair. It requires local community

Just use https://vexl.it/

You are paying for data stored. Which is basically inputs, outputs, and headers.

Please have a look on the schema above. Output B (of original TX) is the same as input B (of CPFP TX). When you remove them you save on fees. Both are redundant. And you don't need even the second TX header since it will be one transaction now.

Yes. It's CPFP - ancestors and descendant merged into one transaction... And all your pending transactions too..

Fee rate has to be increased a bit to motivate nodes to broadcast the new transaction. But total fee can be still lower. See the schema where I'm removing B output, B input, and one header. Or the example from app print-screen is real case where I save 16% even with increased fee rate.

The bigger fees the bigger saving...