Hi Harold - your experiences are exactly like my own. I have a reply from MichaelLAX, though this doesn't seem to have posted to this support community.
He says: "Before you upgrade to Yosemite, partition your hard drive or add an external drive and install Yosemite there. Dual-Boot into Snow Leopard when you want to run Appleworks and Yosemite otherwise." I am thinking of buying Snow Leopard and trying this.
I am happy to keep running my life with AppleWorks on my MacBookPro with Leopard. My only need to upgrade to Yosemite is that I find more and more that the outside world tells me it cannot communicate with my outdated OS. I can't get virus protection, Spotify won't let me download stuff, and while I have the opportunity of free MicrosoftOffice for Mac through my work, I can't take it up (well, I thought having actual Word, Excel and Powerpoint might come in handy). etc, etc.
How many millions (yes, I reckon millions) of Mac users around the world are in the same position? Can't we all put pressure on Apple to do something about it?