It hasn't, and nor has my question about t-shirts.
The reason they haven't is because the standard "LOL, the stupid army couldn't even enforce sleeves up/sleeves down" point is obviously silly the moment you think about it for more than two seconds. Rigid enforcement of the rules means that Army pax in 3X would end up dressed differently to their RM counterparts, in some cases when they're working in the same section or department. In an organization that prides itself on cohesion, that's a barrier being set up when we could avoid it entirely simply letting soldiers roll their sleeves up. That's before we discuss soldiers working at RAF establishments, with partner nations, or on mixed courses in the UK.
The argument for t-shirts is slightly different, but is another example of where blindly taking an 'orders is orders" approach is obvious nonsense. The rules say I shouldn't let my blokes take their PCS shirts off even when it's extremely hot, but basic common sense says I should let them strip down to be more comfortable.
'Orders should always be obeyed' is, and always has been, a terrible idea.