1. I was thinking about getting a new Mac, can you guarantee that I'll be able install the old IWork on it? I don't think so. It will say that a newer version exists! Most people expect IMPROVEMENTS with new software, not steps backward.
2. When I installed IOS7, there was an option to downgrade it to IOS6.1.3, but before I could Apple stopped signing it on their servers. The sound for music, video's and airplay is now screwed up. Works OK on headphones. Volume slider is greyed out. I am not alone in having this problem. Everything fine in IOS06
3. So what if it is a 3 year old phone. It works, not as well as it did on IOS6. Why replace a perfectly good phone?
To 1, yes, on all atm available Macs, all OS, iWorks 09 works. It depens of course, how long you wait. In 1,2 or 3years the situation might change. Also, what you expect and what you get are always two different things. We use iWorks a lot and I did research the new version before I bought it. Since none of the "missing" features affected me, most I did not even know, it was a no brainer.
To 2, if you needed 2 weeks until you decided you now wanted to downgrade again (thats how long it was possible) then I really do not see Apple at fault here. If your volume got messed up, you notice that normally strait away, not weeks later. And to
3, yes I absolutely agree, I hate to throw working gadgets or computers away without reason. I just keep them in there natural habitat. My iPad1 runs on 4.3, my iPhone4 on 6.1, the 4s Phones the same. I know I could go one Version up, same on most of my computers, but the old saying, never change a running system, served me well over the last 30 years, everything is purring allong and just because one COULD somehow squeeze the newest software onto a device that was never build for it, one is not obliged to do it.
With the phones its also a special case, provider support runs for two years (I get every two years new handsets) everything beond that is at your own risk. That was why I said "a three year old phone", I would have left it alone if everything worked.