Folding at home is running out of work because of the overwhelming response. I've found that sometimes restarting the FAH client/container will trigger a new job even after being stuck in a loop for hours
Rosetta@home (BOINC) still has a ton of work items and is CPU based, so it's easy to run on most anything. Some are COVID-19, some are MERS, some are things that have nothing to do with coronaviruses.
I've been running BOINC, and since none of the tasks required GPU, as you mentioned, I was able to scale to a number of devices that the client could be compiled on.
If you have 5-8 hours to devote to a round, put everything you have into it. It's quick to set up and is certainly worth the cycles.
Linus (from Linus Tech Tips) said [0] he is working with the Folding@Home people to set up an additional high-capacity server to alleviate the load troubles.
My CPU client occasionally gets new work units, but it's been idle for most of the week.
Currently, it looks like one of the main issues is not having enough server capacity. If anyone has extra resources or expertise to contribute, see https://foldingforum.org/viewtopic.php?p=314382.
I had a couple hours earlier today of CPU. Currenlty running on 1 Compute node (out of 3) (OpenCL) on my GPU. Which Windows reports as 3% of the GPU. But it's 99% of the actual Compute module.