more cargo bikes or observer bias?

has there been a signifigant uptick in folks riding cargo bikes in philly, or am i just noticing them because i've been riding one?

curious if theres any kind of less anecdotal tracking of cargo use bikes around the city. i feel like i see a lot more of them around but that could be because im on a R&M. i get asked about mine almost every day both by people wanting to get one and folks who have one that want to chat about routes, maintence, the model, etc. And it seems like i see more around at school drop off, people hauling stuff or just tooling around.

curious if its in my head or there are more out there. i dont think they've become more common at everyday shops so i imagine folks who do have them are pretty motivated to be on one and i think seeing them around is a big factor.