But even that rings hollow. in this job market, you keep tech people and just reassign them. Hiring people later to execute on the new vision is hard and expensive.

Or maybe they're just not planning on growing, which is a brave strategy in the tech world.

Doubtful. In my experience this happens when companies are not in tremendous shape. The most likely sequences of events is:

1. Revenues are not as high as needed. If the current trajectory continues they will run out of money.

2. Therefore they need to change the plan. Changing the plan involves firing a load of people.

3. Everyone assumes (correctly) that that is because they are not doing so well.

4. Post a reassuring blog post that everything is fine. SiFive depends on customer confidence.

They probably are well funded for years (2?) to come. And they may be in "tremendous shape" *assuming that their new plan goes as they hope. It does seem a little desperate though. No information on how their new plan is different at all.