There is a serious point I could make about "grammar", but it might take a long time.
There was a tendency in the past (were the Victorians the most culpable?) towards what I term "taxonomania", in other words, every grammatical construction was classified. Then they wrote enormous grammar books containing all these classifications. And when a grammar book runs out of categories it has a small appendix called "constructio ad sensum" (construction according to sense), which is a catch-all for anything they can't categorise.
I would urge writers of grammars to downsize, and explore this realm of constructio ad sensum more. It's a technical term for free-expression.
My Greek (Smyth) and Latin (Gildersleeve and Lodge) grammars are not the biggest, but they are big and unwieldy - it takes years to find your bearings in such a book (when your worries are about syntax more than accidence), and switching horse midstream is tricky - I switched from something else to Smyth and had to re-orientate myself.
Also these grammars tend to be language-exclusive, whereas some points are simply general - how many of you know what an "epexegetic infinitive" is? For things like this, small comparative grammars can be more useful than larger more language-specific grammars.
So a summary is probably that I'd agree with some kind of reduced grammar teaching, as long as a sensible compromise is found.
Ancient (9th century AD) West-Germanic grammar was modelled on the Latin in Jerome's NT, whereas ancient East-Germanic grammar was modelled on the original Greek NT (but then Gothic died out). We perhaps see something similar happening at the moment - American English had been incorporating elements of German/Yiddish grammar (as opposed to Augustan Latin English - hence Victorian taxonomania, although Gildersleeve and Lodge were American. And Smyth might have been, lol. But Americ's big period of immigration didn't begin until after the big grammars were written), and English English has been adopting this from American for a few decades. I won't give examples, but we do have to find an alternative to Victorian teaching.
I have to disappear off for an unspecified time offline to help my ailing parents, so if there's any discussion after this, I won't be able to join in.