Possums Another long in the tooth teacher here , though not quite 20 years! I feel the same and in fact, in my experience, pupils are pushed to achieve more ( in school) today.
I have seen the impact of a lack of parental input and this may be due to working longer hours so I'm not blaming parents. Children are reading less at home which affects grammar, spelling, vocabulary and a whole host of other areas. Sadly, most of mine don't even sit down for dinner with their families and instead eat it alone, in their rooms, with a TV for company.