I have found samsung has broken many things. Biggest culprits are the S2, S3... S4 works better and S5 has fixed most of the issues.
What issues, the list is long.
My list is short WEBTRC does not work on anything under S4 which is a deal breaker as samsung is one of the most brought phones.
In your case you will have to google each issue, and see, but from conversations on my own problems samsung doesn't really care about fixing older devices, that is what the new one is for (I say this tongue in cheek, as they didn't officially say it in those words)