Earlier quoted context omitted.
Nope. It is for the classic web (the only websites worth saving anyway).
Even for classic web, if it's behind cloudflare, then HTTrack no longer works. It's a sad point to be at. Fortunately, the single file extension still works really well for single pages, even when they are built dynamically by JavaScript on the client side. There isn't a solution for cloning an entire site though, at least that I know of
If cloudflare ddos protection is an issue, you can throttle httrack requests.