-A single script, re-executed in a loop at some intervals, serially grabbing all
-the needed data and outputting a status bar string, then passed to `xsetroot -name`,
-while saving state in files (e.g. previous totals, to be converted to deltas).
-
-This actually worked surprisingly-OK, but had limitations:
-
-- I use an SSD and want to minimize disk writes
-- not flexible-enough to support my main goal - easy experimentation with
- various ad-hoc monitors:
- - I want to set different update intervals for different data sources
- - I don't want long-running data collectors to block the main loop