Google Blogger has been largely forgotten, but over the past 1-2 years it's been receiving regular updates.
Mostly these have been improvements with a few odd regressions. Some of the regressions have been fixed.
It's kind of curious. Google still uses Blogger for some of their blogs on googleblog.com (ex: Scholar), but they also have a new platform - https://blog.google (Keynote, Data Centers). On the Keynote blog page the RSS feed is hidden (but exists), on Data Centers and Photos blog there's a familiar feed icon top right. Data Centers articles date to 2012, but the .google domain was only registered in 2014. So they've migrated some old content, probably from Blogger.
I looked a the source from a Data Center post and it's surprisingly old school readable. There are commented out tags for handling IE 7 (!) and metadata for Open Graph and Twitter Card. Style sheets refer to "/static/blogv2/css/blog.min.css?version=4.4" />.
I wasn't able to find any articles on "Google's new blog platform". That doesn't surprise me, Google search is fairly useless these days. Clearly they are up to something internally.
If they do make this a public blogging platform I'm sure it still won't handle paragraph spacing correctly.