Hi Steve, I will have to disagree with you on this. There are major changes between Denaili and SCA 19.2, as well than from Vinson to SCA 19.2
If we talk about new features between SCA 19.2 and Denali, you have (in bold the ones for Vinson):
- Google Tag Manager Editor
- Merchandise Hierarchy
- 3D Secure
- Device Fingerprinting
- Intercompany Cross-Subsidiary Fulfillment
- Save Credit Card Information
- SuiteTax for US and CA
- Tokenization / Payment Instruments
- Facets as URL Parameters
- Service Controllers
- Partial SuiteScript 2.0 support
- Typescript support
- Secure shopping Domain
- Single Secure Domain
- Cancel Order
- Log in to see website
- My Account columns management
- Personalized Catalog Views
- Pick up in Store
- Quantity Pricing
- Quick Order
- Quotes
- Store Locator
- SuitePromotions
- Commerce Categories
- CCTs
- Page Types and Layout Selection
- Theme Customizer
- Theme Skins
On what regards to development you have
- Extensibility API
- Extension Developer Tools
- Extension Manager
- SDF Developer Tools support
- Theme Developer Tools
The big difference is the Extensibility API. If you create your “customizations” through the extensibility API without touching SCA core, then moving to the next major version or even next minor version will be much more easier than in the the past.