Does plotting have a sequential nature in terms of context?

In the process of plotting, is there a connection between different sectors? Or do they have to be completed in series? Can the second index sector only be carried out after the completion of the previous index sector?

Fundamentally sectors are completely independent and can be plotted in any order, but to simplify tracking and reduce storage overhead they are plotted sequentially right now. Alternative implementations can decide to do something different of course.