Hmm, I’d certainly argue that’s a style thing. Though personally I prefer:
The problem with grammar, and in this case punctuation, is that there is a very large American influence that confuses us.
If there is a rule, it’s a rule. Rules should have been taught at school, and once learnt we can devlop styles. If we have a style without knowledge of the rules, it’s wrong!
The grammar threads demonstrate that there is no clear knowledge as people will argue that they correct, in spite of cotradictory rules. If the teachers don’t know the rules, we have no chance.
If we watch a lot of American TV and read a lot of American literature, we’re going to have an incorrect undertanding of Br Eng.
I’m also aware of some of the mistakes that I make, but I’m a human being and try to be correct.
So, in short, it is wrong to cover up a mistake by saying that ‘imo it’s stylistic’!