Nik software has worked perfectly fine with Wacom tablets ever since the day it was owned by Nik. 'We are not officially compatible with the Wacom tablets.

You are still one step ahead of me as I have not heard back from them yet. I got something along the same lines the last time I reported a bug.

That seems to be their standard response. I often don't use it at all in the final version as I find I get much better control when I hand-build a B&W image. What I use Silver Efex for is very much a prototyping tool to look at different B&W approaches. However, I'll wait to see whether people find that it is useful after these and the other bugs have been worked out.I generally only use a few of the tools, mostly Color Efex and Silver Efex and sometimes Dfine. Version 4 offers more control over the definition of control points, which at least in principle sounds useful. But apart from that, my use of version 3 has been identical to my use of version 2. There have been some editing updates also I bought the last version for Perspective Efex, which I didn't have because I don't have other DxO software. My impression is that many of the additional features in Nik updates have been presets, none of which I have used. I certainly am apart from some film emulation presents in Silver Efex, I don't think I've every used a Nik preset in a finished image. I suspect many people on this forum are more in market #2 than in market #1. To oversimplify, market #1 is people who want presets or effects, and market #2 is people who want editing tools. My impression is that the software is trying to serve two very different markets and that this is pulling them in two very different directions.

I just searched (very briefly) for a history of Nik collection upgrades.

Nik collection 4 upgrade