I am not sure that Sound Transit has done a great job at that.

Source: https://iexaminer.org/the-international-examiner-interviews-seattle-city-council-district-2-candidate-tammy-morales-on-cid-key-issues/

PugetPass is valid on Everett Transit, Community Transit, Sound Transit, King County Metro and Water Taxi, Kitsap Transit, the Seattle Monorail, the Seattle Streetcar and Pierce Transit.

Source: https://www.heraldnet.com/news/orca-card-makes-transit-simpler-and-cheaper-too/

There’s another wrinkle: In 2016, King County voters passed the ballot initiative Sound Transit 3, authorizing the West Seattle to Ballard line.

Source: https://iexaminer.org/as-deadline-to-decide-on-chinatown-id-light-rail-station-approaches-community-groups-speak-out/

“We are proud to open this new facility at the Puyallup Station, which will allow greater access to Sound Transit services for the people of East Pierce County,” said Sound Transit Vice Chair and University Place Councilmember Kent Keel.

Source: https://thesubtimes.com/2023/04/05/new-puyallup-station-garage-and-surface-lot-to-open-for-parking/

“We are proud to open this new facility at the Puyallup Station, which will allow greater access to Sound Transit services for the people of East Pierce County,” said Sound Transit Vice Chair and University Place Councilmember Kent Keel.

Source: https://thesubtimes.com/2023/04/05/new-puyallup-station-garage-and-surface-lot-to-open-for-parking/