I've been burned by systems that said a block was "done" and really meant 'probably'..
Dusk is explicit about the line. Blocks can move until they are ratified. Once they are they do not get reinterpreted later. No quiet reorg logic. No post-hoc explanations. You either crossed the boundary or you did not, that's all.
That difference stops sounding academic the first time a trade gets booked, reported... then has to be unwound because consensus changed its mind. That's not a technical glitch. That is a credibility hit.
Once a block is treated as "final enough", nobody agrees on where responsibility actually ended.
That's usually when disputes start costing real money. @Dusk
