Those numbers are based on the GitHub current statistics. Another
comparison is the [openhub dashboard](https://www.openhub.net/p/_compare?project_0=Fabric&project_1=mitogen&project_2=pyinvoke) comparing Fabric, Mitogen and
pyinvoke (the Fabric backend). It should be noted that:
* all three projects have "decreasing" activity
* the code size is in a similar range: when added together, Fabric
and invoke are about 26k SLOC, while mitogen is 36k SLOC. but this
does show that mitogen is more complex than Fabric
* there has been more activity in mitogen in the past 12 months
* but more contributors in Fabric (pyinvoke, specifically) over time
The Fabric author also posted a [request for help](http://bitprophet.org/blog/2020/07/02/help-wanted/) with his
projects, which doesn't bid well for the project in the long term. A
few people offered help, but so far no major change has happened in
the issue queue (lots of duplicates and trivial PRs remain open).
On the other hand, the Mitogen author seems to have moved onto other
things. He hasn't committed to the project [in over a year](https://github.com/dw/mitogen/commit/91f74a04acbc0ebeae939132bfdef0b6b3817e97),
shortly after [announcing](https://sweetness.hmmz.org/2019-10-28-operon.html) a "private-source" (GPL, but no public
code release) rewrite of the Ansible engine, called [Operon](https://networkgenomics.com/operon/). So
it's [unclear what the fate of mitogen will be](https://github.com/dw/mitogen/issues/751).
