We lived in several of the suburbs on the west side of Portland, OR (Beaverton, Tigard, Hillsboro.)
Yes, it's true about no sales tax. But for residents or people who work in the state, it is made up for in income and other taxes. You always pay somehow, but it is good for most visitors (especially if you like to shop! If you know anyone who likes to knit, Portland has some of the best yarn/wol shops in the US. Big craft and hobby shops too. A lot of interesting clothing shops as well. Also, if you have any interest in thrift/charity/kringloop-type shops, Portland has a great many of these and they are often excellent.)
It's also true that you cannot pump your own gas into your vehicle in Oregon. There are attendants to do it for you. It is one of the only places in the US where this is the case.
As for the NL trains, we don't own a car or drive here, for various reasons (including that driving and dealing with parking is stressful for both of us, even in the US.) Usually, we find the public transport system quite good, despite some minor problems on occasion. We know sometimes it limits what we can do and see, but we are OK with that. On this trip, we had to return on a specific day due to my husband's work schedule. We knew there would be some works happening because yes, the NS site did have a warning that we would need to take a bus detour to Sittard and then find our train to Eindhoven from there. That was OK. It only added 20 minutes and a minor hassle to our trip. Cecile74 is correct--it was the unexpected disturbance/problem in a tunnel (near Dordrecht, if I remember correctly) after that point (and the way the changes were handled and communicated by NS) that caused all our delays and problems. Not everyone owns or travels with a smartphone or other device that can access changing information or warnings from websites, either, so there were many of us having to rely on the announcements and information from employees. It would have been far more than just aggravating if we HAD been "normal" tourists without the knowledge we have or if we had been trying to catch a flight or some such. I felt especially bad for the young Italian family with two small children, one an infant in a stroller, and all their luggage (even though it was not excessive for that size family.) They had many more problems to deal with than us, including more of a language barrier. (We did help them as much as we could.)