Extension Perspective Microsoft Blog posts Dynamics 365 for Finance and operations

Hi all, I found two precisely written post by José A. Estevan

https://blogs.msdn.microsoft.com/axinthefield/embrace-the-extensions-mindset-with-dynamics-365-for-finance-and-operations/

https://blogs.msdn.microsoft.com/axinthefield/embrace-the-extensions-mindset-with-dynamics-365-for-finance-and-operations-2-sysextension-framework/

Also interesting video by

Michael Fruergaard Pontoppidan  about chain of command idea under the Extensions.