Dan never left Steem or Bitshares, as in terms of abandoning them. He did what he did, finished them, and left them in good standing. Off to start another project. What more could he have done to Bitshares & Steem? He left those in good programming hands.

Take for example, Jim Keller, a legendary CPU Architect, and one of the worlds best. He built the AMD ZEN microArchitecture (Among many others - AMD K7, AMD K8 (lead architect), AMD K12, AMD Zen, Apple A4, A5, x86-64 (co-author), HyperTransport (co-author), then left the company. He's given AMD many years of ground breaking technology, a solid upgrade path for many years to come. What more could Jim Keller do for ZEN? He's already laid the ground work?

The same applies to Dan Larimer almost in a 1:1 with Jim Keller. The difference between Bitshares/Steem versus EOS is quite different though. You see, EOS is so big and ambitious, Dan Larimer can and probably will stick to this project, because it offers endless innovation due to how its Smart Contracts are structured. EOS has the ability to scale & never stop scaling. There's enough inside EOS.io to continually tap into Dan Larimer's creative brain. He's here to stay, so I recommend buying up EOS while its cheap. IMO