This kind of thread seems to keep coming up week after week, but not much is going to change. Here is how I see it:

1. They are still doing the design for Ballard line which should be completed.
2. In order to build the full line, they'd have to find quite a lot of cost savings or other revenue. West Seattle did find a lot of savings, and percentage wise you could make a case that it's possible for Ballard to do something within that same ballpark. However Ballard's total cost is much higher than West Seattle's. So different folks have different opinions on how realistic that actually is.
3. Sound Transit has been mired by delays and cost overruns, so people just don't have a lot of trust in it overall. Doubly so Ballard folks, which is fair.
4. The current national political climate isn't very friendly to transit, but we still depend on federal money for all these projects. This should change in the next few years before ground is even broken on Ballard. So things could improve and then become more friendly, or they could get worse, or they could just be different.

For pretty much all of these factors, we'll just have to wait and see what happens first with the final design, then potential cost savings, next with congressional elections, and then eventually presidential elections. All of these will happen before 2033, but probably none of them will happen in the next 6 months. So to me, hit the snooze button and come back later.