Without reading the links:
from more then 20y Linux server and datacenter hosting environment, around 7y of Ceph, and hundreds of different systems all configured without swap. I never ever had a problem with noswap that would be solved using swap.
But on my Linux desktop swap helps me a bit.
btw, all multiple hundred croit based ceph deployments are 100% swap free. As we boot over the network directly into the ram, there is no swap disk that would be available. We don't have any issues with this and I doubt we will ever encounter such.