Alert commenter Tlsgwm noted that Sound Transit has once again started publishing quarterly ridership reports, which had been MIA since last November. In July, the agency released the 2019 Q4 and 2020 Q1 reports simultaneously.
Sounder ridership was mostly flat (North Sounder was down by nearly 6% but overall Sounder dropped by 0.3%, a testament to how much South Sounder drives the numbers).
With the Downtown Transit Tunnel closing to buses last year, ST Express Bus ridership suffered, with Route 550 leading the decline. Operating costs per rider increased as well.
2019 ended with Link boardings overall 2.5% higher than 2018. Diving into the station-by-station numbers, though, shows the impact of the tunnel closure as well: UW and Westlake were up 12% versus the year-ago quarter and Chinatown / ID was up 20%, suggesting both more North end riders transferring from buses and more people exiting the system at the beginning and end of the tunnel.
2020 Q1 brought the two-fer of Connect 2020 and COVID-19, which hammered ridership across the agency, resulting in double-digit declines for ST Express, Link, and Sounder. Q1 ended in March, which means it was barely a few weeks of lockdown. 2020 Q2 numbers will not be pretty.