I'm testing the web standalone export in 2.4 (Build number 2.4.18304.1341). Having attempted to export a huge model, and discovering the maximum recommended upload size limit of 500Mb, I've reduced the complexity of the model (in this case, removing all the furniture & equipment) and re-exported without any file-size warnings appearing.
However, once the progress bar has reached the end, chrome displays an "Aw, Snap!" error. Here's the model - https://api2.enscape3d.com/v1/…a8-400d-b509-58458c47cba8
I've had no problems so far with smaller models.