What’s the advantage of using Stan when now there is numpyro and pymc. The newer frameworks seem much more flexible and performant than Stan.
I feel the technical barrier of adoption of bayesian methods is still high enough to deter potential users.
For someone too lazy to read all the docs, is most/all of the lavaan model syntax implemented?
FWIW, there's also a fast and simple alternative in R called greta (https://greta-stats.org)