GrooveOnBeat

So I took the plunge and purchased this mod.   I'll start playing with it once installed.

​It's ok.  I can do the template edits.  It's just a matter of adjusting to IPB 4 vs 3x conditional syntax. 
I still have many uses for IPS Rules for automating data stuff.  One of the things I'm looking at is member incentives through rep integration using IPS Rules.  I'm also interested in the Commerce suggestion earlier in the thread.

Not with rules. What you are describing is not any sort of workflow automation, it is theme switching. To do what you are describing will take modifications that operate on the theme layer. Rules provides automation tools for manipulating the data processing layer.
There is a Rules Lite version of the application in the marketplace which is FREE. It's an excellent way to push buttons before you take any plunges.

Yes, I agree fully. The commerce expansion has not been forgotten.
But it is going to be the largest expansion pack of them all as there is much more than what has already been listed for it to be a complete package.
First I need to get out a much smaller expansion to cover the core IPS downloads app, and then I will start on the ECA's for the commerce app.
And at some point in between all of this, I need to get some documentation written on how other developers can include their own ECA's in their apps using rules extensions in the developer center. My goal and hope is that all apps will be customizable with rules at some point.

Hi @Kevin Carwile
I would really like to see an expansion pack for Commerce, one where rules can be created based on;
product purchased invoice status account credit transaction status support ticket dept support ticket status support ticket severity support note added support reply added That would really help us to link the purchase of a product, use rules to create a collaboration and create a support ticket to the member in order to help them set it up fully whilst being able to create an announcement on the forum and more. The options would be endless with this added to the excellent options already available.
Thanks

Yes to everything you said.
It works on the ECA (Events, Conditions, Actions) design principle. So I guess you could say conditions is its middle name.