Hi Charles,
That's a beautiful Oster! At 960 watts, it should have a lot of power, but I'm not sure how it might do with sorbet or almond butter.
For years, Oster published a book of recipes containing all kinds of things you could make in their blender. The books were often called "Spin Cookery" and sometimes were included with the new blender when purchased. I see these books frequently at thrift stores and resale shops, and I'm sure there are tons of them available on Ebay. They shouldn't be very expensive.
I will tell you that the number one thing I use my blenders (all vintage models - many of them Osters) for is making salad dressings. I love old fashioned celery seed or poppy seed dressings that are tangy and sweet, and they are made beautifully in the blender.
Your Oster blade and screw collar will also fit on a standard Mason jar, which comes in handy for doing small batches of things like grinding coffee beans, making bread crumbs, or chopping herbs.
Enjoy your "new" blender!!