Summary
The downgrade CI tests have been disabled by adding if: false to the job in .github/workflows/Downgrade.yml.
Reason
The downgrade tests have been consistently failing and likely need to wait for updates in OrdinaryDiffEq before they can pass again.
Related
See SciML/DelayDiffEq.jl#357 for similar change in DelayDiffEq.jl.
TODO