I found the below in Cambridge Dictionary web-site:
We use much in questions and negative clauses to talk about degrees of something.
We don’t use much in affirmative clauses.
Also, it the same web-site, I found the following:
She runs much faster than he does. here
also I noticed that some web-sites use much with affirmative clauses:
May we all be having this much fun and getting this much exercise when we're his age! PJ Media
Is it Okey to use much in affirmative clauses? If yes, when can we use it? and what is the rules?
Update:
Here is another example on how often the word "much" is used in informal style:
After much consideration I will NOT be performing at the Inauguration with my improv group Capitol Hill-arious Ike Barinholtz
