there are still options to handle comments (disqus, facebook comments etc.) that don't need a database on your server.
there's solutions for pretty much every dynamic aspect of a blog. If wordpress is slow, and google is going to penalize your search ranking, it's worth looking into.
And by using said other options, you give control of your users to a walled garden service. Do we really want more of the internet centralised around Facebook and its ilk?
It's hosted & serverless, like Facebook and Disqus.
But at the same time, it's open source, so you will be able to export your comments from Talkyard's servers, install Talkyard yourself and import the comments.
(But I haven't yet built export and import functionality :- P )
there's solutions for pretty much every dynamic aspect of a blog. If wordpress is slow, and google is going to penalize your search ranking, it's worth looking into.