Blog Post
Azure App Service Premium v4 plan is now in public preview
Will it be possible to upgrade unsupported resource groups / appservice plans to the V4 sku without having to create a new plan or resource group in the future?
Many of simply don't have the possibility to do so and it would be great to simply be able to update our existing V3 plans to their V4 version.
For now using a new resource group + app service plan + site in a given region, and explicitly choosing a Pv4 SKU at creation time is the best way to ensure getting access to the new SKU (more details here: https://learn.microsoft.com/en-us/azure/app-service/app-service-configure-premium-v4-tier#create-an-app-in-premium-v4-tier )
Much like what was done with the prior generation Pv3 SKU, things will eventually get to a point where re-creating isn't necessary - but for now the above guidance is the recommended approach.
Thank you for the question and feedback!