It is still stalling where it was last year, unfortunately. Which means: you could do live patching with PureData, but as soon as the CPU usage and the number of objects in the patch increases you may start hearing clicks in the audio as soon as you move your mouse. It could still be ok for some applications, but we do not actively support it as of now.
Things are a tiny bit more advance with Purr-data, in that I had a sketchy proto where most mouse position messages are not sent out, so that the audio only clicks when creating new objects or patching cables, which is expected. The bigger picture and what is needed to get this to work properly is explained here, in the
Streamlining Purr Data GUI-Pd communication paragraph. Hopefully we will get some help from GSoC candidates, but nothing has come through so far.
If you are interested in any of the above, I can dig out a couple of branches I have if you want to try building it for yourself (probably requires some C/git/make skills).