[Existenceblinks]

I built complex form before on financial platform where it contains complex investment details, different entities for different kind of offering .. with vanilla javascript. But that may sound grumpy old man in argument. Stimulus' weak point may be where it requires many DOM mutation per action, that's probably better use declarative way to re-render the whole thing in different way based on data.

[catwind7]

Not at all - I still favor vanillajs if only to avoid the bloat of the whole modern js toolchain (webpack...babel...extra compile times)

There's also a big difference for us within the form world between forms with ephemeral state and forms that need to persist state through many interactions and sessions. The former is perfectly fine for us to handle with vanilla js, the latter just becomes easier for developers with a declarative model.