I think 40+ is appropriate for Oxbridge, but they should raise the A level requirement to at least 4 As or even 5.
But still. I do not regret my decision in choosing the IB over the A Level Exams.. If I was to do the A Levels, I would only choose the 3 sciences. The IB enabled me to choose English which I love, a language and maths in addition to the 3 sciences.
People who apply to Oxbridge know who they are themselves. Generally only students with four or more A-levels would apply to Oxbridge
. Applicants are realistic and this is the reason why Cambridge interviews 9 out of 10 applicants (Oxford interviews less but it is about 5-6 out of 10.
Moreover, in A-levels, UMS is far more important
because students in Year 12 have to take AS exams, top universities including Oxbridge are apparently not keen on applicants who only gain marginal A (commonly 80%) than ones with 90% or 95% in AS.
Also, until now the offers from Oxbridge were surprisingly kept at 3 A-levels to encourage students to drop 1-2 subjects
so that they would become more specialised
and they would have time to prepare for further exams
(if required) such as LNAT, BMAT or STEP.
Therefore, there is nothing wrong about Oxbridge's decision of giving its offers.