It's not noobs its people who either :-
a. Use their mac in a work productive environment (video production etc) where time is money. They are CORRECT - for THEM or for use in this environment a PPC or any older slower machine is no good at all to them.
b. They are fully signed up Apple fanboys and/or gadget manics who just have to have the latest and greatest (I have a tendancy for this but with age I have got better at fighting it and spending my money on some of life's far more important things). They scorn anyone on 'old tech' because it just isnt cool..to them
In time I realised a few things...
i) There is no greater comedown than buying a new PC/Mac. You get to trembling fever pitch walking in the store for that AWESOME iMac or way-too-cool iPhone5, you get home barely able to control yourself - set it up (all good so far) and start installing/setting it up the way you want it - the way your old machine/phone etc was set up... Next day, you look at your shiny new purchase and think....'*****, did I really spend $##### on this? It's just like my old one only a bit faster for a few load heavy processes i hardly ever do (and probably arent time critical anyway) and now I've set it up it even looks exactly the same.'
ii) A thing I think most of us on here agree on, if your machine does what it needs to for you then there is no need to spend a fortune on a new one.
Spend it on holidays, your wife/gf, children, family home repairs... etc
Also please lets not degenerate this forum into a "Intel s*cks balls!" kind of place - I couldn't care less who made the CPU in my machine, a faceless greedy corporate animal like IBM, Apple, Intel or AMD just so long as it does the job and is designed with some passion, which in fairness I think ALL Macs are