Bases will not close as there is a reason not to close them. It saves them money and too many guys/girls on bases would quit if they were forced back to HKG. This current mess will be sorted out.
They will only be available in the future if there is a benefit. It will still save them money to get pilots with expat benefits onto a base. It will not save them money to get cadets to take a base. If enough cadets leave when they have experience as want to go back home it may well be worth their while to keep the base slots available. If none leave when told no bases it will remain, no bases.
No one knows what will happen, maybe a commuting contract, maybe bases, maybe no bases and no commuting contract. Unfortunately there is no answer at the moment for your question. Oh there are not and never have been bases for SOs other than temp ones for two months at a time, very unlikely to start again.