Yea and the ride is cr@p, really harsh and you lose grip as the tyre doesnt deform and comply to the surface.
You can also get Mousse foam inserts for off road motorcycles, Ive used them and again the ride and grip is reduced, plus they are bu99ers to fit and eventually break down.
There is nothing to compete with gas filled tyres on any vehicle, just that the risk of punctures is always there
Aviation wise, id still say there is nothing that provides the same shock absorption as a gas fill and as you say, weight can't be bettered