@mids2019
I haven't read the full thread, so I may be repeating others, but you have completely misread the Guardian article. A third of grades being A or A-star very different to:
- a third of grades being A-star.
- a third of students getting all A-stars.
- a third of students getting all A's
If any of 1,2 or 3 were true then your thread might be justified, but they aren't.
I could stop there, but to answer your other points ...
"Oxbridge can use interview and additional tests in selection of students but where does this leave other universities?"
It leaves them using personal statements, as they have always done.
"I have looked at some of the Oxbridge rejection threads and there are many unlucky applicants with perfect grade profiles at GCSE and A level.so have we reached a point that the perfect 'grade A' student does not hold the prestige it once did and you are now just one of many."
Ox & Cam have never been able to cater for their international demand. And it has never been the case that a clean sweep of top grades was sufficient to gain a place. Perfect 'grade A' students have always gone to other excellent UK universities.
"I think we need to introduce an A star star grade as we have to accept grade inflation is a thing so we just need to accommodate to make university recruitment (and employment) make sense."
There is no grade inflation - grade boundaries are altered each year to make sure that a similar proportion of students achieve each grade.
Also, you don't understand university recruitment. The most competitive courses have always used interviews, exams and/or personal statements to distinguish between candidates.