The entire premise of that article was based on the example of "engineers" trying to port COBOL code to Java and using floats for maths of financial transactions. Yes, they can't say "just use BigDecimal" and still have enough content to be ranked well by Google, but that in fact is the solution to that particular problem.
"When you are a major financial institution processing millions of transactions per second requiring decimal precision, it could actually be cheaper to train engineers in COBOL than pay extra in resources and performance to migrate to a more popular language. After all, popularity shifts over time."