Modular seems rather CPU heavy - Why is that?

Modular significantly raises the bar for realistic modeling of analog circuits. It represents an entirely new level of detail when it comes to modeling individual oscillators, filters, and other circuits.

Some competing products offer a low-quality mode to preserve CPU. We do not do that, as such a mode would neither live up to Softube's quality standards nor to the quality standards of our partnering companies, such as Doepfer and Intellijel. Softube's reputation for being heads and shoulders above the competition is what convinced our partners to work with us in the first place.

So Modular is as demanding on the CPU as it needs to be. With that said, we are constantly looking into optimizations and other means of preserving CPU power for all our plug-ins. But we can of course not promise any substantial future CPU savings at this point.