What is the current recommended value for the MS_PROCESSORS configuration variable for V8i and CONNECT?

I'm working with a customer to move them from MicroStation V8i to MicroStation CONNECT.  In one of their Site level configuration files they are setting MS_PROCESSORS = 1.  I know that the configuration file is likely 10-15 years old, or at least parts of it are.

I know that 10 or so years ago the recommendation was to set MS_PROCESSORS to 1 but haven't been able to find any current recommendations. 

For computers running an i7 chip with Windows 10 (or possibly Windows 8) what would be the current recommendation?

If the value should be something other than 1 is it better to just remove the MS_PROCESSORS setting and let the default value be used or best to set it?

Thanks,

Mike