sure, [@Mahz].

This is kinda what we'd hope to put, but it gives some nasty error messages if we try:

[code][list][*]a
[*]a
[indent][*]b
[*]b[/indent]
[*]a
[*]a
[/list][/code]
[hider=errors]Errors:

    The tag "bbcode" is not allowed as a parent of the tag "*".
    The tag "bbcode" is not allowed as a parent of the tag "*".
    The tag "bbcode" is not allowed as a parent of the tag "*".
    The tag "bbcode" is not allowed as a parent of the tag "*".
    Some tags appear to be misaligned.[/hider]

Instead, we have to do it like this now:
[list][*]a
[*]a[/list][indent][list][*]b
[*]b[/list][/indent][list][*]a
[*]a
[/list]
[code][list][*]a
[*]a[/list][indent][list][*]b
[*]b[/list][/indent][list][*]a
[*]a
[/list][/code]

Note the removal of extra line between each set of list tags. That makes it hard to organize, when such a list is meant for organizing a post.