In an attempt to create explicit support documentation, I need input from the community on 2 related topics.

What ESPs, tools, APIs and or SaaS email delivery products move the <style> element from <head> to <body> prior to send?
For example, Impact 10.4 from Zeta (formerly Acxiom Digital) does this.

Is there any current comprehensive list of email client support for the explicit position of the <style> element in <head> and in <body>?
For example, the Campaign Monitor CSS Support page has not been updated since 2014, and the MailChimp CSS Support page has not been updated since the major Gmail update of October 2016.