A single sat wouldn't be transferable without millisats.

Every sat there is exists on chain. No millisats exist on chain, they are only on LN and there they are a second class citizen because they wouldn't be settled in the event of a dispute, in other words they can't be used trustlessly.

captain_stacks

A single sat doesn't "exist" on chain either. Try sending me a single sat without spending hundreds of sats in fees.

If anything, a millisat "exists" more than a sat since you can actually send me a millisat across a channel we share without paying any fees.

Both are accounting figments. Not necessarily a tangible, transferrable, discrete unit.

bitcoin

❓What is a Satoshi ⁉️❓

simple

A single sat doesn't "exist" on chain either. Try sending me a single sat without spending hundreds of sats in fees.

If anything, a millisat "exists" more than a sat since you can actually send me a millisat across a channel we share without paying any fees.

Both are accounting figments. Not necessarily a tangible, transferrable, discrete unit.