Yes, but remember: static HTML is a one-way street. Better tell your manager otherwise they will one day come up with functionality that can't be done in your website and it's your fault.
EDIT: For example: manager/designer wants to add an assistant to the website; it should be draggable; it should also animate and keep animating smoothly no matter where the user navigates on the website. If your website is a SPA, this is conceptually easy. If your website is static this is going to be a nightmare and suddenly a simple change requires lots of work.
EDIT: For example: manager/designer wants to add an assistant to the website; it should be draggable; it should also animate and keep animating smoothly no matter where the user navigates on the website. If your website is a SPA, this is conceptually easy. If your website is static this is going to be a nightmare and suddenly a simple change requires lots of work.