I prefer to use the ISP DNS servers instead of running my own, so I had a dozen domains served by the excelent Linode DNS manager. I’ve been a loyal Linode customer for years but DigitalOcean’s offer is too good to ignore.
DigitalOcean also has a DNS manager, but migrating all domains manually would be painful - so I wrote this script. If you are procrastinating your migration because of this, you don’t have this excuse anymore. :-)