HowTo Build with Amazon EC2: Still up-to-date?

Is https://openwrt.org/docs/guide-developer/build.with.amazon.ec2 still up-to-date?

I'm asking because this page has the WIP tag set since at least 2011 and has not seen any changes since then. This makes me wonder if an 8 year old page that never has been finished does provide correct and usable information that is worth keeping in the wiki.

If it is outdated (i.e. instructions from 2011 do not work any more in 2019) and nobody is willing to update the page, I would delete it in the current wiki (the page will still be available in the oldwiki).