Are unattended nodes included in the limit of consecutive chained nodes?

Activity chaining will break if:

"The number of unattended nodes that exists between two (attended) activity-chained tasks surpasses the (default) maximum number of 50"

Start and end events are not attended/unattended, so are they not included in the total?
Subprocess nodes are attended/unattended, so is there a potential design cost to nesting subprocesses?
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OriginalPostID-75814

OriginalPostID-75814

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