To be honest, in Diana's case, that is something we will never know. Going by what I've witnessed here in the different threads, Diana's seem to have long periods of inactivity until someone bumps up a thread and then its a flurry of activity and then goes silent once more.
Yes it does, though as Diana has been dead for 18 years now I suppose that's natural. No new clothes, hairstyles, speeches, lovers, to discuss, or her relationship with her children and their spouses.
Diana though did have tremendous popularity within Britain and Europe and it would have been interesting to see if it would have remained with age and fading looks or whether her experience would have been akin to Margaret, Paola and even Grace.