I think that there is a great deal of misunderstanding surrounding this subject. My understanding is that as has been the case for many years, if a choice HAS to be made (and then only after all other options have been exhausted), outcomes will always be considered.
So if there is only 1 ventilator / extra care bed is available, and 2 people need it, outcomes will be considered. Ventilation, which is an invasive treatment, will often itself be a high risk procedure. So doctors will consider, 'if we ventilator this individual will they be able to breath for themselves when we remove it'? 'Which patient is most likely to survive ventilation and lead an independent lifestyle'? Or even 'do we have any other patients who are not coping well with ventilation treatment, for whom removal of their ventilation is the best opportunity for them to maintain life going forward'.
These are really difficult questions but not new, & not age based (though by very nature of their age, older people are less likely to respond to the degree of invasiveness). My grandson died after my son was advised to agree for h is ventilation to be removed in the hope that he would try to breath alone). My mother had her ventilation continued for several months, because she continued to fight. My son would in all probability not be offered ventilation due to his ongoing health problems, and likely premature death.
I don't like these decisions, but in all reality they have and will continue to be made, for the greater good.