WordPress has a deserved reputation for getting slow, fragile and insecure — and almost none of that is WordPress's fault. It's what happens when a site is assembled from a marketplace theme, a page builder and a plugin for every requirement, each written by a different author to a different standard, all loading on every request. The platform is fine. The assembly method is the problem.
We build WordPress the way we build anything else: a custom theme from a clean base, custom blocks registered for the block editor, and plugins added only when writing the functionality ourselves would genuinely cost more than maintaining someone else's. That usually means single figures rather than dozens, which is the difference between a site you can safely update and one you daren't touch.
The measure of a good WordPress build is what your marketing team can do without us. Registered blocks and patterns let them compose new pages from pieces that already match the design system, so campaign pages ship the same day they're briefed. That's what keeps a site improving after launch rather than decaying until the next redesign.