A follow-up post to state that I regularly update the 0ad snap with the latest releases.
The current version in the stable channel is 0.0.23b-alpha, while the edge channel has a fairly recent svn development snapshot.
Maintaining the snap is a minimal amount of work (builds happen automatically on Launchpad) so I'm happy to continue doing so, however I'd like to highlight that one big advantage of transferring the ownership of the snap to Wildfire Games is that it would give the project control over the branded store page at https://snapcraft.io/0ad, and access to a dashboard with detailed metrics (versions, distributions, territories, weekly active installations).
As a quick glimpse of what this looks like, here is a screenshot showing active installations per version over the past two years:
As you can see, there are currently more than 4K users of the snap, and whenever an update is available the way snapd automatically installs it ensures that players will always be on the latest version. And the snap is being used on 19 different linux distributions (snapd currently supports more than 100 of them).