It seems like many of the other Stack Exchanges have adopted the new profile design ( Stack Exchange, Workplace, Arqade, Webmasters, etc. I think it's a pretty cool design and was wondering why we're still using the old profile. Any chance we can upgrade to the new profile prototype?
For us (Stack Exchange) to enable the new profile on Wordpress.SE, we first need to complete CSS updates, which require a bit of design work.
This old-ish announcement explains this in more detail: New profile pages are out - bugs and feedback master list.
And, you can see the the list of sites that have yet to be converted here (which as you can see includes Wordpress.SE): List of communities with base css updates completed.