In my experience, while there is a new library/framework/language every day, most of them aren't introducing brand new concepts that the developer has to worry

In my experience, while there is a new library/framework/language every day, most of them aren't introducing brand new concepts that the developer has to worry about. A lot of the patterns they implement are also common in other language/frameworks. Nothing against React, but every other day someone posts a new concept that is very similar to a pattern that has existed for years. Edit: I should note, on the last sentence, this may be done by a veteran developer who knows better but is trying to introduce the concept in a new light. It could also just be a developer figuring out a common pattern on their own. I've heard the actor model pattern was developed by several different people at the same time who were unaware of each others work. I'm not saying it's a bad thing.