What moving off WordPress actually involves
The content comes across cleanly. Pages, posts, images and menus are exported and rebuilt, and every URL is mapped one-to-one so nothing that currently ranks loses its address. What does not come across is the plugin stack, and that is usually the point: the contact form plugin, the SEO plugin, the caching plugin, the security plugin and the page builder all get replaced by things that are simply part of the build.
The work that takes the longest is the audit, not the rebuild. A WordPress site that has been running for five years typically has plugins nobody remembers installing, a theme that has been patched in place, and a media library with several thousand files of which a few hundred are actually used. We go through it, keep what earns its place, and leave the rest behind.
Redirects are where most migrations quietly go wrong. Every old URL gets a 301 to its new home, including the attachment pages and category archives WordPress generates automatically and most people forget exist. Your rankings move with you rather than starting over.
Expect four to six weeks end to end. Your existing site stays live and untouched the entire time; the switch happens when you approve the new one, and the only thing your customers notice is that it loads faster.