In favor of existing metric time proponents, a kilosecond is 16.7 minutes, which as you suggest is a pretty good unit of resolution for most scheduling concerns

In favor of existing metric time proponents, a kilosecond is 16.7 minutes, which as you suggest is a pretty good unit of resolution for most scheduling concerns during a day of human activity. The fun problems happen because most of the prefixes between kilosecond and megasecond (nearly a fortnight at 11.6 days) and between megasecond and gigasecond (a whopping 31.7 years) are either deprecated or non-standard to begin with. For instance myriaseconds (10^4 or nearly three hours) might be useful, but myria- was dropped from the metric prefix list for good reasons.