I don't know if Stereo Delay or Stereo XOver blocks have already been suggested. Anyhow, since it normally happens to configure stereo systems, it is quite annoying to create Groups for linking Mono blocks.
Thank you for this feature request and I will log it.
Any idea how often you received this request?
Any other block need to be stereo (of maybe multiple channels, like we have with the gain block), thinking of VPEQ, SPEQ?
Not so often, since we can normally do without it.
But that would save some time, and it is quite curious that we have lots of blocks where we can change the channel count, and these two blocks can't do it.