We have begun our port to Apple Silicon, and have already updated some products. We hope to have everything done by the end of November.
Having said that, it should be noted that our testing has shown that native Apple Silicon hosts don't really seem to care whether the plugin is Intel or ARM. In our testing so far, our own products are indistinguishable in the Apple Silicon native versions of Logic and Mainstage, as are the other plugins we have tried from our friends in the industry.
On the whole, our general opinion is that as a producer you won't really notice (or even be able to tell) whether a plugin or host is running native ARM or in Rosetta 2. The CPU load should be more or less the same; the ARM version may be slightly lower, but this is difficult to measure consistently. If you run in to any problems at all, please let us know at the earliest convenience, so that we may address any issues. Our ability to test in this environment is limited by the fact that hardly any hosts have been ported to Apple Silicon at this time, so we are, to a certain extent, relying on you to tell us.