Exactly, this is a rebalancing since Apple because a huge portion of Berkshire's portfolio due to it's growth. They became over 40% of Berkshire's holdings, too much for them to be comfortable with.
I don't think they are making up arbitrary rules, I think it's problem solving. Brainstorming alternative solutions that are cost effective and solve the problem is a useful exercise. We shouldn't just blindly use machine learning because it's there.
I have this trick where I just pay for high quality, well researched news because I'm an adult and I realize that not everything should be free and maybe we should pay for some things.
People on HN like to complain about paying in data to use Google and Facebook and yet also consider it an affront that they have to pay money to journalists.
I believe the universal approximation theorem is for a single hidden layer. When more layers are added arbitrary functions can be approximated.
From section 4.6.2 of Tom Mitchell's Machine Learning book:
"Arbitrary functions. Any function can be approximated to arbitrary accuracy by a network with three layers of units (Cybenko 1988)."
Robert Caro's series on LBJ is IMO possibly the greatest nonfiction work of the last century. The depth of research, the quality of writing, and the study of politics and power are what make the series so enticing. Sure the volumes are long, but it never seems like necessary information or too much detail and it never drags. I highly recommend reading at least one of the volumes.
I would also highly recommend "Gulag" by Anne Applebaum. She covers the entire history of the Gulag in great detail from the Revolution to the fall of the Soviet Empire.
I think you might like Command Line Heroes. It's made by Red Hat and they released three episodes so far with good production quality. The first two episodes were about the early history of Linux.
We use it in products at work and it always works seamlessly. It could be a quick and easy way to pair a phone to a car or connect a phone to WiFi. Just tapping is way more efficient than the current connecting options when you're near the hardware you want to connect with.