SAP Cloud SDK Extensibility

Hi experts,

I'm Fiori Developer at some SAP Partner company and I would like to gain knowledge as possible in BTP, S4/HANA in-app and side-by-side extensibility. I achieved my first certification in side-by-side extensibility in BTP with CAP model (C_CPE_14) and I noticed that when I prepared for this exam besides the technical knowledge, I gain a lot of infrastructure knowledge in the cloud area. I would like to keep this strategy. I found another learning topic which is Develop Advanced Extensions with SAP Cloud SDK and also a certification C_S4CDK_2023.

I found some topics about this area and some people said that you have to have a piece of knowledge in Java but when I looked at this learning journey, this extensibility could be used in JS with NestJS. As a Fiori Developer, I can handle it.

Sometimes I find myself learning not related to my area or my goals because of my lack of knowledge. My question is what do you think about this area, should I spend my time learning this? Do you think that every BTP developer should know that? Lastly, to learn, which should I have to make prioritise between embedded steampunk/steampunk and this topic?