I don't know why but I love looking at the historical "crudge" that builds up in situations like this! Especially from people that don't specialize in software.
I have never had a look at their website, so thanks for posting that. Buffet's recommendations for GEICO and Borsheim's [0] are funny and not something I would have expected from him...
Sillier than that even. From https://www.berkshirehathaway.com/subs/sublinks.html
<meta name="ProgId" content="Word.Document">
<meta name="Generator" content="Microsoft Word 15">
Some other pages on the site:
<META NAME="GENERATOR" CONTENT="Adobe PageMill 2.0 Win">
<meta NAME="GENERATOR" CONTENT="Microsoft FrontPage 3.0">
Seems like they tried all the cool WYSIWYG tools.