IBM App Connect is a mature product because it's been there since the mainframe time, and it's evolving.
We use IBM App Connect for the integration between the applications. You can unify the integration layer into one layer, where you manage the whole integration process. You can simplify the management, operation, and maintenance of the integration layer.
If you want to fix any of your APIs or integration connections, you don't need to do it on all tenants. You need to do it only once in one place, and it will reflect on only one channel. It works with multiple languages and protocols. So, you need to create it once and use it on any different applications that you have.