I think the content of this is probably very similar to the Pituitary Foundation leaflet, a link to which was posted recently.
ese-hormones.org/media/ov4h...
I'd be interested to know whether your doctor (GP or rheumatologist) has discussed the phenomenon of adrenal insufficiency with you. It's a major reason why tapering is so important and why patients are urged not to stop taking steroids abruptly.
ESE says that, for most people, the adrenal system kicks back in with production of cortisol once the dosage of corticosteroids goes down enough. For us that's pred. So most of us, statistically speaking, will be OK.
I find it intriguing that the symptoms of gluco-corticoid-induced adrenal insufficiency described in the leaflet are very much like the symptoms of Polymyalgia Rheumatica!