We use some very complex apps for our store that took many months of development. Basically, some of them run all of our shipping. To make matters worse they were developed using the REST API, which has been deprecated. Due to the complexity of the apps we were unable to move them to GraphQL. (Although we are currently building a replacement app, but it will not be available for some months). We now have an additional problem. The following article states:
“If you use dashboard-managed extensions, migrate them to the CLI or remove them, as they won’t function on the new platform.” -
Next-Gen developer platform now available to all app developers - Shopify developer changelog
This is a nightmare for us, there in no way our apps can be migrated to CLI. At least not within one week.