newstart_MO said:

Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

Correct, and worth adding that it is reversible. Nothing being described here is a one-way door, which changes how cautious it is reasonable to be.

That is the short version; the long version is somebody else's post.

LeilaHI said:

Right, and one flattering data point from a group buy is not consistency.

That reframing is the part I needed.

newstart_MO said:

Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

This is where I part company with the consensus forming above. I would resist the confidence. Half of what this board was certain about two years ago has since been quietly dropped, and nobody went back to correct the threads.

One concrete data point for the thread. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.

Ask again with the specifics and you will get a better answer than this one.

Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here. Carry on.