Fun article, the phenomenon is interesting to see in practice, I've seen it regularly with newer instance types as it can take time for people to add them to their configurations.
We're heavy users of spot here in Intercom. I spot-checked our biggest workload, and this week we could have paid around 10% less if we were able to get the cheapest spot host possible in us-east-1 that is suitable for our workload (all 16xlarge Gravitons). However that would be at the cost of fleet stability, I think that to run relatively large production services used in realtime on spot you need to prioritise fleet stability, so choosing the "Capacity Optimized" strategy. We've seen incessant fleet churn when trying out cost optimised strategies.
We're heavy users of spot here in Intercom. I spot-checked our biggest workload, and this week we could have paid around 10% less if we were able to get the cheapest spot host possible in us-east-1 that is suitable for our workload (all 16xlarge Gravitons). However that would be at the cost of fleet stability, I think that to run relatively large production services used in realtime on spot you need to prioritise fleet stability, so choosing the "Capacity Optimized" strategy. We've seen incessant fleet churn when trying out cost optimised strategies.