Nostr clients or are you envisioning pay to use bitcoin node software?

I’m a Knots maxi, but I’d also love to see other client implementations within the consensus rules, because I know Knots isn’t immune to what’s happening with Core right now. Switching between implementations should be as frictionless and easy as switching mining pools. Client decentralisation is just as important as mining decentralisation. The latter has become obvious in light of recent events.