At CodeSandbox we use Firecracker for hosting development environments, and I agree with the points. Though I don't think that means you should not use Firecracker for running long-lived workloads.

We reclaim memory with a memory balloon device, for the disk trimming we discard (& compress) the disk, and for i/o speed we use io_uring (which we only... See more

''What every programmer should know about memory'' by Ulrich Drepper from Red Hat is still a great primer on memory utilization. https://t.co/IfW8jwJAtb