Salzburg is probably the worst city in terms of transit and is still perfectly serciceable. It’s keadership is still pretty car focused though - and it shows. There is talk about some rail option rosskng the centre bit nothing is ever really getting built because … think about car traffic which must not loose any capacity …

Lower Austria outside of the main corridors and the Vienna metropolitan area has a rsther poor track record as well. They closed down a lot of the smaller branch lines. To be fair however at the same time bus/rail integration has improved considerably. Most villages have somewhat usable rush hour service and a lot of places have at least one bus per hour with synched train connection.