Ways to have both regeneration and cross-contamination prevention?

Is it to have a dedicated regenerator per device it’s driving? Gets expensive.
What are practical methods to truly have both regeneration and cross-contamination prevention, as commonly known the PowerPlant does not have this?

This is something I asked Paul about several years ago. @Paul basically said that it would not be cost-effective to do so. Instead, they build a good power supply into their gear. That keeps their equipment cost-effective/competitive in the marketplace.

Yes without doubt. But no cross-contamination protection.
Is there no clever way around this?