The hard part is displacing Wordpress market share; building a community of bloggers, marketeers, agencies, web designers, and so on; creating a huge ecosystem of paid and free plugins, allowing plugin devs to commit to your marketplace and lock customers in.
Wordpress is awful. The only thing it's got going is its moat, but that's not an engineering problem, but a people problem instead.
Other than that, it seems it might be a half decent headless CMS, if the bit of WordPress you want is its interface, and not the number of plugins and devs and not being tied to Cloudflare's infrastructure.