The settlement delay isn't there for technological reasons. People think they want instant! fast! until they lose their life savings because libertarian tech has no buffers.
Capability based operating systems require that your program possess something, like a handle, in order to do something privileged. Don't have the handle, can't do the thing. It's not about consulting ACLs or bitmasks or whatever.
Exactly! My point is that the fact that mechanical RO units exist and are small shouldn't detract from the utility of the purely electrical solution in the fine article.
Tesla made a partnership with a battery company, too. They used Panasonic's batteries during their formative years. Why is Tesla beholden to different rules when scaling up?