Does anyone have a good theory about why (1) there are so many static site generators and (2) market share is so widely distributed? Is this a case where (1) it's easy to build static generators and (2) everyone's needs are a little bit different... or are there other dynamics at play?

Also, static generators and bundlers (webpack, parcel, etc.) strike me as needing to solve many related problems. Do we believe there's a meaningful integration to be reached down the road?