I've been developing a package lately which uses several timers, and
because of that I use M-x list-timers often. I don't see in the NEWS of 27
changes related to this, so I list some problems.
The first thing which wasn't obvious first that the Next column displays
the time in seconds, but the Repeat column uses minutes, though it's
not indicated anywhere in the header that they use different units.
Generally, the best solution could be to use days, hours, minutes,
seconds format, instead of displaying floating point values.
E.g this line
195.08 5.00 savehist-autosave
could be more readable like this
3m 15.08s 5m savehist-autosave
Or this one
26479.43 1440.00 run-hooks
like this
7h 21m 19.43s 1d run-hooks
The latter also demonstrates an other problem: if you only see
run-hooks as the function then you have no idea what will actually
run. It's not trivial to find the source. So if the function has args
then they should also be displayed, at least in some shortened form
with the too long part cut off if the args are too long.