I will split this, but primarily because this thread here isn’t meant to discuss use cases and potential solutions in detail.
But it’s useful to point at any such solution that exist already in OH, today.
Quite some wishes on this list in fact need not be put on here as solutions for what’s the real intent behind such a wish are there but the requestor isn’t aware of.
@liaskt are you aware of profiles ? The timestamp-change one for example ?