There has been commits to pulseview 3 weeks ago and libsigrok 5 weeks ago, so it's still active. Now, its the kind of project that doesn't need frequent updates. What you could expect is new hardware support, and to a lesser extent new protocol decoders. However, the basic principle is that who needs it contributes it, and I wouldn't be surprised if people bought supported hardware instead. ;) Also, hardware generally comes with supporting software, so the need for sigrok/pulseview is less pressing in these cases.