Why does UpDownCounter not expose the same functionality as a gauge?

[RichardWright]

Why can an updown counter not be used like a gauge? As in, record values as they are without having to diff them to work out what to move the gauge by?

Example where a gauge is used with js/prometheus without worrying about up/down - https://github.com/siimon/prom-client/blob/master/lib/metrics/eventLoopLag.js#L31

[dyladan]

You're looking for a value recorder, which records the current state of a value.