I'd disagree with him about basic quality if you want to print it - although if you only want to put it on farcebook etc it will be fine, and realistically 6mp is enough to print as large as most people are going to - I remember seeing an Andy Rouse print of a hyena cub at A0 which was taken at 4MP (back in the day with a 1D mk1)
I mentioned earlier that some people can print large with a low number of mp, mainly because they had to in the past. It didn't all start with 36mp.
It takes some working to get 4mp to A3/A2 or whatever and look good, and beginners, and even those with lots of photography experience, may struggle to print well from so few pixels, so why advocate people only need 6mp? Would you advise anyone to limit themselves to 6mp if they have a 24mp camera?
I met someone last year who had their Canon DSLR (18mp) set to 3mp. I asked why, and she said she 'could get lots of pics on a memory card', (10k+
) and the pics were 'easy to send in an email'. Ok I said, how many pics had she ever taken in a day? She said 1-200. Why do you need space for 10,000 pics then? I said do you ever print pics? 'Sometimes' she said. I said do you know you may be limited in how large you can print your pics? 'No' she said.
Memory is cheap, why limit yourself with regards to quality and resolution if you don't need to. Yes there may be situations for lowering the quality and resolution, but KR advocates that as default.
I don't agree with everything KR says, after all his job is to be contentious - but it is equally silly to say "never listen to KR" as some of the stuff he says is decent advice in some circumstances - such as if you are starting out you shouldn't get obsessed with MPs and you should learn to use your camera before you start worrying about other stuff
The thing is that he writes c**p on purpose, and the uninformed/inexperienced can't always determine the good from the bad. I advise people to steer clear. As with everything though, people are free to do whatever they want.
It needs threads like this every so often though to tell people why others think it is good or bad to read what he writes.