I think, at least for the list-like examples, this is missing an important aspect of what delimiters ‘mean’ to humans.

The delimiter goes directly after the items because it means ‘but wait, there’s more’, and so mentally puts you into a mindset of being prepared for the next item. If list-like delimiters are placed at the start of lines, the reader is forever in a heightened state of ‘is this thing over or not’ as they go on to the next line.

I’m not arguing that this is world-ending or anything, but I do think it’s what makes me feel ‘uneasy’ when reading the examples.