Using seconds as the base unit of time would work in various situations, but not all. For example, kiloseconds (ks) would be handy for measuring the runtime of a movie or the length of a workday. In that regard, it’s just a matter of getting used to it. However the length of a solar day is about 86.4 ks and a year is about 31.54 Ms, which would be annoying numbers to memorize. Then again, remembering numbers like 60, 24, 52, 365 is about as annoying too, so that’s a problem for another day.