That all sounds like something that will require maintenance.
Being able to slide a dead drive out, slide a new one in, and have any extra space be added automatically is fantastic. Not having to worry about updates, etc. These are things I'm willing to pay for.
If Synology is not interested in your use-case it doesn't really matter if you'd pay them to support it. But also they suck at most of what you're claiming anyway IMHO. Even their docker version is six years out of date.
