Why does Creative ALL apps plan not include the 3D substance apps

Agreed.  I was fortunate to learn this before committing to the subscription.  I would be paying for many things in "All Apps" that I have no use for and not getting the apps I need for my complete workflow.  Adobe needs to stop pretending it knows what the user needs and allow for a customized bundle at an affordable price.  In particular, the intersection of AI with additive and subtrractive manufacturing equipment at incredibly affordable consumer price points make 3D no longer a sub niche.

If not carefully adapting to the needs of its customers and the rapidly changing dynamics in the market (i.e. agile newcomers, open source apps, and AI tools in particular), Adobe will find itself repeating history, littered with seemingly untouchable, former dominate players in the tech world with the likes of Word Perfect, Lotus 123, Harvard Graphics, Corel Draw, Novell, Peoplesoft, IBM, Blackberry, Sun Microsystems, and numerous others.  Where there is a demand, there will be a supply and we are at a tipping point.

It appear to me that saying I have "All Apps" and then not having all apps is deceptive.

Why does it say All apps if it's not all apps?

By @xxOkata

Yes, it can be confusing. It's not the first time we've seen a comment like this. It must seem odd to those unfamiliar with Adobe.

On the other end of the scale, others have asked why Photoshop Elements is not included in the All Apps plan. There's no clear answer other than Photoshop is already included.

Keep in mind that Adobe sells, or offers subscriptions for, close to 100 separate apps aimed at consumer, professional and enterprise. 30 or so of those are in the Creative Cloud.

Cutting through the Adobe jargon, the best I can make out is that All Apps refers specifically to all Creative Apps in the Adobe ecosystem.

They've also got several other app categories: 3D, Document Cloud, eLearning, marketing and ecommerce amongst others.

hard to say why adobe chose to call a plan "all apps" when it's not even close to including all adobe apps.

For the same reasons it doesn't include eLearning tools like Captivate, Digital Assets Management tools like Adobe Experience Manager or the other Adobe niche products.

3D is a sub-specialty that appeals to a select group of designers. 

If Adobe added Substance 3D to Creative Cloud, regular Creative Cloud users would have to pay more for something they may not need or want.