I have been building unique line of business applications for years using Dynamics CRM as the platform (xRM applications). The foundation used to build Dynamics 365 Customer Engagement apps has evolved into Dataverse and model-driven Power Apps. The benefit today? You might not need expensive Dynamics 365 licenses if your organization doesn't need them (yet), but you can get all the same features and functionalities of the core Dynamics 365 CE apps by building model-driven Power Apps on Dataverse (for a fraction of Dynamics 365 licensing costs). Added benefit is being able to extend those apps using Power Automate, Canvas-apps, Power Pages and other Power Platform technologies.

Presentation:
Evolution of the Power Platform
Benefit of building business apps on the Power Platform

Discussion:
Compliance Issues with Power Apps
Business Apps: Buy, build, or customize?
Start with Dynamics 365 or start with Power Apps?
Microsoft first party apps, accelerators, and industry solutions -> benefits?
Migrating from a Power App to Dynamics 365

Demo (optional)
Build a simple CRM app using the Power Platform