To me, what's sad, is that when Zeppelin died, so mostly did Page's musical output. Nowadays, he seems rather uninterested in making new compositions - or at least in releasing anymore new music. Partly, I think it's because he's still grieving the loss of Zeppelin. But also, he's not a lyricist and likes having a good singer who can write compelling songs - and I guess Plant checked those boxes so well that he doesn't want to look for another. Course, he could make some purely instrumental things, but how successful would that be - or attractive to record companies?