Frédéric Dichtel asks, in a comment on a totally unrelated posting of mine (and also on Facebook):
Could you possibly devote one on the use of the unmodified quantifier many in affirmative statements?
The traditional rule states that this use belongs to formal style. But what about the following sentences extracted from the COCA American Corpus? Aren’t they neutral in style?
Cryptochromes were discovered in plants many years ago.
In many ways, my family’s story is universal.
There are many risks for any outside company.
Could it be that the formality of many differs according to whether it is subject, object etc.?
Many readers will be unfamiliar with the “traditional rule” Dichtel refers to. It comes from usage advice in the ESL literature (so it’s significant that Dichtel is not a native speaker of English). In this literature, writers are told to use many (or much) when it’s modified by a degree adverbial (very, so, that, how, etc.); this is in effect a grammatical requirement, since the alternative a lot isn’t available in this context. Writers are advised to use many (and much) in questions and under negation (in preference to a lot) —
Were there many people at the party?
There weren’t many people at the party.
but otherwise (that is, in affirmative statements) writers are told that many and much are formal in style, while a lot is neutral.
The advice literature meant for native speakers tells a somewhat different story. This literature generally misses the connection with “negative polarity” contexts (questions and negation) — not surprisingly, because much of this literature maintains that a lot is informal in style, too informal for use in formal writing (a claim that might have been true at the turn of the 20th century, but is not true now).
The case of much vs. a lot is treated at some length (with links to Language Log postings and other literature) here; much of this carries over to many, though there are some differences. In particular, the “formality effect” seems stronger for much than for many, though for both there are contexts in which they can occur unmodified in affirmative statements without conveying formality of style, as in Dichtel’s examples from COCA. (I have speculated that there are indeed differences according to syntactic function (subject vs. object, in particular), and differences according to the verb in the sentence, but these speculations aren’t easy to investigate.)