Actually, every single game ever has had bugs, and also on older consoles.
And Nintendo is no exception.
How long has the latest version of Pokemon been out? The game is already version 1.2.
Also, what about MissingNo in the first titles? Or Glitch City?
Every single piece of software since the dawn of time, has had bugs. That's a fact.
The reason software and games nowadays got more bugs, is because the technology has advanced far, far more. There are many more factors that plays a role in it, and this is one of the many reasons we see bugs more frequently today.
We as customers expect more and more, and since information is more widely available today, you hear much more stuff about the design of the game, the features, etc. than you did in the past. And just like forever ago, developers sadly has to cut features or change them, because implementing them is either impossible, or they just won't be able to make it before deadline. The biggest difference is that today you actually hear about this, and just a couple years ago, you didn't.
However thankfully, because patching is easier and possible today, adding these scraped features becomes a reality.
People really shouldn't complain about getting features that was scraped, and instead just be happy for it. 10 years ago, this wasn't even an option