The name of the fallacy you are looking for is the fallacy of novelty. The fallacy pattern is specifically x is better thsn y because x is newer. We can also imagine this argument along the lines of technology. This computer 2017 is better than the 2014 computer. But in some cases the person is correct which is why this is tricky.
Novelty is a fallacy simply because the pattern does not guarantee the conclusion 100%. That is the conclusion is not forced as the newer model does not have to have better quality or features. The newer model may have more defects than the older model for instance.
An argument firm cannot be valid if there is even a 1% chance of the conclusion being false as in the example i gave. You can also think about auto recalls. Several cars that were newer have recalled over the older models. There are tons of cases which prove the conclusion is not forced.
The fact sometimes you are right and sometimes the person is wrong makes it not 100%. If a conclusion is not forced or guaranteed the argument is not valid.
I aplologize foe i made abd error in the interprtation at least in my head. I read it but registered the message backwards. I was corrected. However either way there is a fallacy. I happened to use the wrong name. The correct name of this fallacy is tradition. That x is original or older and must therefore be better. The pattern is different but the explanation of why this is fallacious remains the same. The conclusion is not guaranteed in either fallacy I named.