OK I was under the understanding that, with the update, you could revert back to your original OS if you choose. I may be wrong about this, sometimes I am wrong!
That being said, I updated from 7 to 10 shortly after they came out with it. There was a slight learning curve with the transition but overall it was fairly simple, and there are a couple of features I thought were nicer. However, like you Dan one of my installed games, Bejeweled3 will not load any more!! But, seeing as how I played the he!! out of it and had all the badges you could win, I really didn't care that much! There are probably other programs on my computer that might not work any more either but hey, if I haven't used them in years, so be it! Bejeweled is still on my computer, but when I click it, it does not load.
I've switched to playing games on facebook, but be warned, many of them although free, end up requiring you to "buy" money or tokens in order to really accomplish anything! But of course you already know that by playing "Island Experiment, don't you Dan!!