Anyone who is really committed to their infrastructure will not build it on top of highly proprietary stuff where you have 0 visibility into what's actually happening so you can only hope that somebody fixes it sustainably, in a reasonable time frame and permanently.

With open source, if you have the right people, you can find/ bisect down to the commit and function where the problem is exactly, which speeds up the remedy immensely. We have done such a thing with backup restores from the Proxmox Backup Server. The patches are now in Proxmox VE 9.0 because the low hanging fruit problem was actually with the client code not the Proxmox Backup Server.