On the other hand, Berkshire Hathaway is Apple's largest investor.

Berkshire Hathaway Energy owns and operates some of the world's largest wind and solar energy farms and is building state-of-the-art Terrapower (Bill Gates) nuclear reactors:

https://www.brkenergy.com/

There's a lot for a "tech investor" to like about the company. As a consequence, Berkshire has a top-notch subreddit, probably the best subreddit of any company:

r/brkb (https://old.reddit.com/r/brkb/)

Other investors will appreciate that Berkshire owns all of a large part of America's freight transportation system:

https://www.bnsf.com/

And is the largest investor in important parts of its financial system (Bank of America), etc.