A semantic layer is a translation layer that sits between your data and your business users, converting complex data into understandable business concepts. Let's discover its history, trends, and if it's here to stay.
I'd say the ability to understand a problem set and break it down into pieces is the most important skill for software engineers. You can have all the AI tools you want, but if you don't truly understand what it is you are trying to solve, you will likely end up at an over-engineered solution that requires consistent iteration.