  As the James Webb Space Telescope (JWST) came online last summer, we entered
a new era of astronomy. This new era is supported by data products of
unprecedented information content that require novel reduction and analysis
techniques. Recently, Niraula et al. 2022 (N22) highlighted the need for
upgraded opacity models to prevent facing a model-driven accuracy wall when
interpreting exoplanet transmission spectra. Here, we follow the same approach
as N22 to explore the sensitivity of inferences on the atmospheric properties
of WASP-39 b to the opacity models used. We find that the retrieval of the main
atmospheric properties from this first JWST exoplanet spectrum is mostly
unaffected by the current state of the community's opacity models. Abundances
of strong opacity sources like water and carbon dioxide are reliably
constrained within $\sim$0.30 dex, beyond the 0.50 dex accuracy wall reported
in N22. Assuming the completeness and accuracy of line lists, N22's accuracy
wall is primarily driven by model uncertainties on broadening coefficients and
far-wing behaviors, which we find to have marginal consequences for
interpreting the transmission spectra of large, hot, high-metallicity
atmospheres such as WASP-39 b, in opposition to emission spectra and climate
modeling which depend on deeper parts of a planetary atmosphere. The origin of
the opacity challenge in the retrieval of metal-rich hot Jupiters via
transmission spectroscopy will thus mostly stem from the incompleteness and
inaccuracy of line lists.
