It became popular when there weren't many CMSs that non-tech people could easily install and use. It now has first-mover advantage and an entire ecosystem of p

It became popular when there weren't many CMSs that non-tech people could easily install and use. It now has first-mover advantage and an entire ecosystem of plugins. In addition to this, there are entire companies dedicated to making sites based on Wordpress. To overcome this is a daunting task because you need to convince non-tech people to move to a new solution and have something that already has a 15-year head start.