Sylve looks like a decent project with a promising future but this article really doesn't explain why they picked it over Proxmox at all. They explain a lot of things but I can't see the advantage over prox other than they wanted to use it.
OP here. One thing we mentioned in the blog but probably didn’t emphasize enough is how deeply ZFS is integrated into the UI. With Sylve, you rarely need to touch the CLI. Snapshots, datasets, ZVOLs, even flashing images directly to ZVOLs, it’s all handled from the UI in a straightforward way. That tight ZFS integration also lets us build more flexible backup workflows. You can back up VMs, jails, or entire datasets…
Do you have any opinions on how this works vs doing iSCSI to some other storage system using ZFS? That's how I've been handling Proxmox on the backend, and have mixed feelings. The GUI leaves a very great deal to be desired in honestly curious ways, have to touch the CLI a lot even for super basic networking or auth stuff, and of course neither side has the same insight to the data structures in question. Either you've got to do ZVOL instances and thus manual effort or scripting, or you give Proxmox a single big blob then let it manage that with LVM but that means the storage side can't give any granular help on snapshots and the like. It still can deal with data integrity and backups and storage redundancy and all that but no further, and some increased overhead. But on the other hand, I do feel like a really firm separation of concerns isn't without value. Having native support though is an interesting alternative I hadn't really considered.