When databases became a common part of ERP systems over 20 years ago, developers would say that no matter what else happened, they would always have SQL. “Give me a connection string and I’ll get you anything you want,” was their moto.
Today, that’s not the case. With the advent of SaaS in general (and cloud-based Business Central in particular), you now need to know things like “ODATA and “APIs” — especially if you want to combine data from multiple systems in a single report or data warehouse.
I joke that the definition of SaaS is “software where companies save lots of money on infrastructure and upgrades, which they end up spending on data and reporting.” (Which is good for me, I suppose. I never liked infrastructure and always liked data.)