@13thfloormonk, that’s the combo I’m using. Tyres popped on easily and seated using just a track pump. Using about half a Stan’s mini bottle worth of sealant. Dropped a bit of pressure overnight on initial set up but settled down after first ride. Now loses about 10psi over a week, pretty compatible to my last set of wheels on lightweight tubes.
Back to my original question: can you run tubeless wheels/tyres without sealant?
There is no simple answer to that. You can run some tyre/rime combinations without sealant and other combinations you can't as the tyre/rim is not air tight on it's own. In my experience even the same tyre and rim can sometimes differ.
So the answer is if the tyre stays up without sealant then you don't need it but there is no guarantee which tyre/rim will do that.