Scenario:
I run a blog on a CMS-based platform (like WordPress) and I purchase a domain.
After some time I will purchase a host service from a web company and I want to import there the entire blog from the CMS-based platform (WordPress in this case) by keeping everything (domain name, content, top-level domanin extension/s…), so that the blog will be identical to the original except for no longer being holded by WordPress.
By going from the CMS-based platform to any other kind of site will I lose the places I reach on Google ranking in the intervening period?