Though I see what you're saying, using a PPL for VAEs just seems like overkill given the simplistic nature of VAEs.
PPLs are useful when the data generation process is not easily represented by something like a simple multivariate Gaussian, etc. You find many good examples academic research, e.g. epidemiology.
PPLs are useful when the data generation process is not easily represented by something like a simple multivariate Gaussian, etc. You find many good examples academic research, e.g. epidemiology.