i think its a great resource, but not being nostr-native content reduces visibility from those that want to see it if they haven't found the #nostrdesign hashtag.
The way think about it is that nostrdesign is a centralized KB with one content creator on one relay.
If it was actually a relay, you can whitelist npubs to also contribute without setting up an account. Their home can be on the nostrdesign relay, but visibility will increase as its broadcasted to other relays.
And at then end of the day, you can have the same website, but you only display the notes you care about for your community - be it all notes from your relay, or a select few. Design stays the same, your're just pulling the content from the relays.