When I took the certification exam for Processing Rules a couple of years back, I remember it stating there was a maximum number we could create, and I remember that number being around 100. I was wanting to now if anyone had a definitive answer for what the maximum number was for the creation of processing rules. I wasn't able to find it in the help documentation, and I don't have the time to go searching through the presentation video to see if it's still mentioned there.
Scroll down to the fourth line of the table, and this is what I found:
Processing rules limit increase
The number of processing rules allowed has been increased from 100 to 150. Additionally, the allowed size of the processing rule XML has been increased to 4 MB (from 65 KB). This size change prevents an error that was being issued when the XML limitation was exceeded.
I don't see any updates in Release Notes after June 2015 changing these limits. If anyone else can find anything more recent, please let me know.