However, ALL past comments made on blogs by readers using Google + accounts will be removed when Google + closes. This may mean that some comment threads have gaps in: there is nothing we can do about this.
Google statement:
30 January 2019
In December 2018, we announced our decision to shut down Google+ for consumers in April 2019 due to low usage and the challenges involved in maintaining a successful product that meets consumers’ expectations. We want to thank you for being part of Google+ and would like to provide the next steps, including how to download your photos and other content.
What will happen to Google+ comments on Blogger and other sites?
Blogger and other sites may use Google+ for their commenting system. Comments on blogs may also exist as posts or comments on Google+. This feature will be removed from Blogger by 4 February and from other sites by 7 March. All your Google+ comments on all sites will be deleted starting on 2 April 2019. You can download and save these comments.