I think we should also create a list of tools still on precise and work on a roadmap with devs, I would volunteer to that as well if the committee thinks it is s good start for first task.
@madhuvishy has been making some progress towards creating a list based on a combination of the OGE accounting data and the live jobs on the grid in T149214: Make a nag system to email maintainers of tools still running on precise grid hosts. I'm sure she would welcome any help you can offer. Maybe we could make something like https://tools.wmflabs.org/extreg-wos/ that keeps track of which tools that could use help migrating. I'd hope we can find a better name than "wall of sadness" though.