Because HL is missing 301/302 redirects, migrating websites into HL is impossible in some cases because we can't forward old URLs to new URLs. (For example, if the previous site had the .html or .htm extension on all URLs, HL drops this and, thus, the old URL path needs to be forwarded to the version without .html). For optimal indexing, websites also absolutely must have a sitemap. Further, what website doesn't have the ability to add blog posts? The website module is still very limited at this point.
HIGHLVL-I-1757