Well, that's a great load of anecdotal shit. I have had an S3 since it came out in Canada in 2012, and it is still working fine (I've moved on to the Nexus 5, but my wife uses the S3 to this day). It has had no problems, and a few months ago I moved it to Cyanogenmod without issue.
The hardware is fine, and it's never had an issue. So while I'm sure this new OS will probably suck, let's try to figure out why it'll suck for actual reasons, rather than the Galaxy line which is actually pretty good. Credit where credit is due.
And it is really awesome for coding. I'm sure 4K is even better.
Those who can, do; those who can't, write. Those who can't write work for the Bell Labs Record.