Java serialization is not used anymore because it caused plenty of security issues at the beginning. That doesn't make the article any wrong or misleading.
Let me put it another way, it doesn't strike me as the best possible example to use.
This is clearly on the past, as an example that once existed.
> Java provided ... there was no way
If anything, that text in misleading people into believing that Java doesn't do it anymore, instead of just nobody using it.