Well, Dmoz closed in 2017 but some of the RDFs are still around. There will, of course, be a major linkrot problem to be solved first by anyone using that data. Apparently the ODP project has been renamed as Curlie.org. That's enough of the history lesson. Here's the question: Is it worth building a web directory in 2021?
Search engines such as Google lag in detecting new websites and especially so in ccTLD. The FUD about link building from Google and its buddies in the media a few years ago has deterred new sites from linking and compared to the pre-FUD webscape, the lack of links is creating a kind of island effect for many websites. While the number of new websites each month overtook the abilities of hobbyist web directory operators (winging it on a PHP script and a prayer) to cope with the numbers of new websites around 1998 or so, would a partially automated approach (think of it as a smarter search engine that detects and classifies sites) work?
Regards...jmcc