Depending on how you count it, this is the fifth or sixth blog I've contributed to, and the first running on Ghost. The first was on Blogger (I never did have a LiveJournal), and the rest of them have been WordPress, which has been the reigning champ of the blogging world for a long, long time.
But WordPress is... old. It uses PHP and CGI scripts, which are perfectly functional but dated. Nobody with a choice would use those technologies to start something new and modern.
Practically speaking, this isn't a problem. As a rule, old tools are debugged and they've had a lot of time to have the kinks worked out. There is an incredible amount of support around WordPress. There are people who make a living just making WordPress websites for other people who just need to actually