However, TB here is also providing a Replicated State Machine with consensus and strict serializability, in front of object storage, to provide remote object storage capacity and recovery, but with local NVMe latency and without sacrificing consistency or durability.
TB navigates the entire design space, specializing for both hot and cold (transactional) data.
The more you zoom, it’s a stronger set of guarantees in terms of safety and performance.
If we add a "vertical" capability, it cannot be at the cost of any existing "horizontal" capability, nor should doing so forfend any future "horizontal" capability. And vice-versa (adding horizontal capability should not mess with vertical ones). The point at which one will break the other is the theoretical design limit of the system.