An interesting read about Apple’s Catalina can be found HERE
I guess it’s worth asking the question Why upgrade at all? I realize you can’t keep to that principle for ever, but you probably can for a number of years without too much problem. It always seems as if we have got into the habit of expecting to upgrade annually, even though the benefits of doing look less and less rewarding. Last year the big thing seemed to be Dark Theme. Wow, I mean just wow!