We're not talking about no disks as in no storage, just nothing other than object storage. This does have a latency trade-off, but with the advent of S3 Express One Zone and Azure's equivalent high-performance tier (with GCP surely not far behind), a system designed purely around object storage can now trade cost for latency where it makes sense. WarpStream already has support for writing to a quorum of S3 Express One Zone buckets to provide regional availability, so there's not an availability trade-off here either.
We're not talking about no disks as in no storage, just nothing other than object storage. This does have a latency trade-off, but with the advent of S3 Express One Zone and Azure's equivalent high-performance tier (with GCP surely not far behind), a system designed purely around object storage can now trade cost for latency where it makes sense. WarpStream already has support for writing to a quorum of S3 Express One Zone buckets to provide regional availability, so there's not an availability trade-off here either.