Shouldn't this も be が?


This sentence is in my JLPT practise book in a section on the use of
`目{め}まぐるしい`:

> 社会{しゃかい}の目{め}まぐるしい変化{へんか}についていけず、時代{じだい}遅{おく}れになる会社{かいしゃ}も多{おお}い。

I think the sentence is saying, "There are lots of companies that do not keep
up with the bewildering changes in society."

If that's right, why does it use `会社{かいしゃ}も多{おお}い` instead of
`会社{かいしゃ}が多{おお}い`?




The も suggests that there are (possibly a lot or more) companies that keep up
with society's changes, but there are **also** those that don't.

が is also possible here, in which case the meaning would have no reference to
companies that keep up with the changes. It doesn't change the overall
meaning, but does change the scope of what the speaker is referencing. With
the も example I might expect more that the speaker refers to both groups of
companies in subsequent sentences.




The も suggests that there are (possibly a lot or more) companies that keep up
with society's changes, but there are **also** those that don't.

が is also possible here, in which case the meaning would have no reference to
companies that keep up with the changes. It doesn't change the overall
meaning, but does change the scope of what the speaker is referencing. With
the も example I might expect more that the speaker refers to both groups of
companies in subsequent sentences.

