I think cheap uber/lyft ate their lunch originally but what sealed it was the introduction of dockless bikes & scooters.

Of course those smart cars didn't really help either. They were great for parking and stuff but damn did it feel like driving a gocart. My foot was either at full throttle or no throttle.

...I do miss it though.

I think another kicker for carsharing at the time (~2020) was this forecasted revolution of driverless cars and robotaxis, which has sortof continued (waymo) but also collapsed (argo, cruise / tesla safety issues, etc. ) over the past couple years.

I liked carsharing from the stance that even if it didn't make me want to get rid of car ownership, it made me feel less inclined to invest as much into car ownership (i.e. keep an old used car with cheap insurance, use carsharing if my car needs maintenance or going on a trip where i dont want to worry about breaking down or if taking another mode of transit back.)

This line of thought kinda gets into the predicament of carsharing (and arguably rideshare/robotaxi) services owned by automotive companies - they're fairly deep in the business of selling cars much more than attempting a service business.