No, not implying Roland's only do this (never said that at all, your inference, not mine..), just trying to explain why a tempo LOCK is useful for more than disco medleys... (I quoted Scott's post, in answer to WHY this might be needed).

Just got a bit enthusiastic describing the other options as well, because there seemed some confusion on this thread (probably mostly mine!)...
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An arranger is just a tool. What matters is what you build with it..!