I've notice most people are either divided between Lisk or Ark. I'm currently only a holder of Ark although like the rebranding Lisk did. Hopefully Lisk does fix their delegate issues as a lot of people in their community are upset with it. At the moment Ark has a better delegate ecosystem and trying to implement multiple programming languages available for their project. While there are many pros and cons to each, I'm sure both will stick around in the long run.