SFPD’s staffing levels are also at historic lows (and much lower than UN averages) while the work required to investigate and prosecute crimes has increased due to the professionalization of policing (a lot more TPS reports but also valuable constraints on autonomy). Perceived aggregate activity being down isn’t particularly surprising.
The U-Haul stunt was largely just a stunt. It was later revealed the DA’s office just didn’t get their paperwork right to organize evidence transport.