Enabling https on my sites with LE also enabled me to realize how messed up my apache2 configuration files were. certbot-auto did not even know what to do. I had to fix stuff for 2 hours, playing with virtualhosts and other things I did not understand.

But since it is all clean now, I just enabled https on a new blog and certbot-auto handled all the process happily.

2 things pushed me to do all this work:

SEO: Google announced https sites would rank higher

Security: I don't want my blog passwords to travel unencrypted anymore.