Nothing changed on that score in 20 years.
Usually, with age, people start doing such things. Nobody think about smell at 20, but everybody after 40

You may not notice that, just because that is very slow process, You can not notice quantity changes ... only quality changes could be noticed, and not immediately of course, with ages.
apparently not.
ok ... <offtopic on>
Old lady(L) in doctor(D) office:
L> Doctor, I affraid that I have some health problems
D> Please, tell me more.
L> I am farting
D> Everybody is farting, even me
L> Doctor, I am farting permanently, each second and more frequently. Nobody noticed that just because my farts are totally smelless and silent.
D> I see ... I will prescribe You some medication, and You will come for followup in two weeks.
In a two weeks at the doctor office:
L> Doctor, what kind of medication did You prescribe to me? Once I took first pill, my farts start smell. And they smell more and more, and now it is so nasty, that I can not stay in a place where I just farted.
D> Ok, I will write in Your file that we fixed Your nose, and now we will try to fix Your ears.
<offtopic off>