For me it's a one-off joke. Nice to know it exists, but not a fair challenge.
Wordle itself is just about perfect - a good implementation of a straightforward game, with just the right number of guesses.
Quordle is fun - but it's not that difficult really. A decent selection of a first word should give a reasonable in to at least one answer, and then it's a case of picking them off one by one and being willing to flip rather than persisting too long.
Nerdle? Meh. A slog, not a game. It has a solution, therefore it's solved, to adopt the mathematician's mantra. I've just tried crosswordle (
https://crosswordle.serializer.ca/) for the first time, which is quite generous once you've got your head around the rules. Also heardle (thanks TC), which in theory should be easier (more options, but much stricter combination rules), but in practice is brain-bending given the unfamiliarity of the IPA phonemic translation and what appears to be the standard US pronunciation it's based on.
My favourite alternative is still Byrdle. It's very nerdy, but it's the right kind of nerdiness for me, and the basic wordlist is generous. Unlike sweardle, where you have to enter a blue word at each stage, you can enter a general word to narrow down your options.