I worked out that my first round with Hugo was 9 months (May 2017 to Feb 2018), then 7 months on Wordpress (Mar to Sep 2018) and 8 months in HTMLy (Oct 2018 to May 2019).
Why change? I have different thoughts about ease of use, aesthetics, flat file vs database and ease of access/update. I would prefer some flat file/text based system. I value ease of use. I want the blog to be pleasing to look at. I want the information I choose to be front and centre of the site. Each of those platforms has offered different measures of that criteria.
Grav was with by Trilby Media.