What Cubase thread are you referring to? IMO, yes it’s more CPU hungry than your average plugin and requires a powerful machine to run some of the more elaborate presets. But isn’t this to be expected for this kind of plugin?
For now, I’m just going to recreate the “multi-tap” effect I want using multiple mono or stereo effects in combination with panning and linked panners, etc… That I can pile on a bunch of - say, EchoBoy - in a single effect channel to do this and have literally no CPU issues tells me the MultiTap might have some kind of processing or memory hangup…
It is true that Nuendo’s Multitap Delay eats CPU cycles for breakfast, but then, there are other “new” factory plug-ins that show the same behaviour: One instance of Nuendo’s FX Modulator needs almost 10% of my M1-based MacBook Air with its “Starting Point 01” preset.
… must be something in the code libraries used for several plug-ins of that software generation.