Do people still use GPUView? It hasn't seen a lot of development in years AFAIK and wondered if it was still working and useful.

PIX is great! It gets regular updates and an active and responsive Discord channel.

We use it internally, I'm not entirely certain of external usage. It still works and is good for tracking command packet scheduling and inter-process wait chains.

Yup, PIX is THE tool for game developers. Direct3D team also has a very responsive discord channel :)