I think this has more to do with the fact that cell-phone cameras got much better. 2010-era phone cameras were pretty crappy. My own Holga never had light lea

I think this has more to do with the fact that cell-phone cameras got much better. 2010-era phone cameras were pretty crappy. My own Holga never had light leaks, and most of the effects I got out of it were done via double-exposure or cross-processing the film (a very common Instagram look).