alt Hacker Newsgettext have everything, plus a huge ecosystem like tools to coordinate collaboration from thousand of contributors etc.
if alternatives don't start with a very strong case why gettext wasn't a good option, it's already a good indicator of not-invented-here syndrome.
It's not hard to make a case against gettext, despite its maturity and large ecosystem.
IMHO pluralization is a prime example, with an API that only cleanly handles the English case, requires the developer to be aware of translation gotchas, and honnestly confusing documentation and format. Compare that to MessageFormat's pluralization example (https://github.com/unicode-org/message-format-wg/blob/main/s...) which is very easy to understand and fully in the translator's hands.