I think you two are talking past each other. Yes, people use WordPress for serious websites, and WooComerce stores, and all that stuff. But Tallain is not talking about those people. Tallain is talking about blogging.
Blogging is also often business critical. Entire businesses are built around blogs. I presonally know someone who sold their "wordpress blog" for $30m.
Blogging is also often business critical. Entire businesses are built around blogs. I presonally know someone who sold their "wordpress blog" for $30m.