"LLU does not use that technology.
LLUs can, of course, use whatever technology they like. But given that one of their USPs over BT is constancy of good performance, on the whole they tend not to do as much fancy automatic knob tweaking but prefer to deal with edge cases as they arrive.
Then, of course we have HSB via whatever, which is a whole new ball-game and again I think not rate adaptive?
If by HSB I assume you mean FTTH (fibre to the home) ?
Oh, don't you worry BOAC..... the old tricks of contention, packet shaping and rate limiting will be there. Except they will be increasingly more coarsely applied downstream rather than granularly at the subscriber level.