Fail over? I’m not against redundancy/HA in production systems, I’m opposing clusters of machines to perform data workloads that could more efficiently handled

Fail over? I’m not against redundancy/HA in production systems, I’m opposing clusters of machines to perform data workloads that could more efficiently handled by single machines. Also note here that I’m talking about data science and machine learning workloads, where node failure simply means the job isn’t marked as done, a replacement machine gets provisioned and we resume/restart. I’m not suggesting running your web servers and main databases on a single machine.