I go right back to '76
. I was considered "bright" in the academic sense and got 7 'O' Levels with 4 As, 2Bs and a C, including English Language, Lit and Maths. At my school you had to have 5 passes (A-C) to go into Form 6. I did another 2 and passed in Lower 6th.
In those days, 5passes was the passport to the Civil Service (or any of the public services really). Most people aimed at that as most left and got jobs at that point.
I think the difference (I have this discussion with my dd) is that you had to pass the exam, otherwise you failed. There was no course work, so no chance of building up marks that way. You could resit, but you had to wait. No-one resat exams they had passed, for better grades.
I don't think that many kids got the 5 passes but as long as there were jobs, that didn't matter too much.
I think it's hard to compare then with now, tbh. In those days, the teachers didn't seem to be that bothered: if you didn't work,tough. It was your call. League tables and the like didn't seem to exist, so not so many vested interests in passes.
I think my daughter is going to be taking 4 compulsory subjects plus another 5 non-compulsory ones. To be honest, she's no high flier academically; I think that's standard across the board at her school.
I think the main difference is the number of kids going to University now. In my day, it was 5%; now it's closer to 50%, I think. And you could get in somewhere then with a couple of quite poor ALevel grades; now the entry requirements seem much higher.