> In many cases Wget2 downloads much faster than Wget1.x due to HTTP2, HTTP compression, parallel connections and use of If-Modified-Since HTTP header.

This appears to be offical: https://gitlab.com/gnuwget/wget2

Which has this wiki: https://gitlab.com/gnuwget/wget2/wikis/home

> The idea is to have a fresh and maintainable codebase with features like multithreaded downloads, HTTP2, OCSP, HSTS, Metalink, IDNA2008, Public Suffix List, Multi-Proxies, Sitemaps, Atom/RSS Feeds, compression (gzip, deflate, lzma, bzip2), support for local filenames, etc.

> Some of these feature have been built into Wget in the meantime, but some other are really hard to implement into the old codebase.