I don't know the answer to your question but while Vagrant and Packer both have been pretty bad experiences for me, Consul, Nomad, Vault and Terraform are very different products and all pretty actively worked on. I am using them all at the moment and am very happy.
Consul seems like a very mature product and development has maybe slowed down, but I think this is mostly because it is mature and looks like HashiCorp does not feel the need for feature bloat.
Re:Consul 1.0 Released
by schmichael on Tuesday October 17, 2017 @12:24PM
(#15492244)
I'm not sure if exact employee numbers are public, but I can assure you a lot of hiring has taken place over the last year and all of these products have dedicated engineering teams as well as supporting staff (customer success, sales, management, etc).
(I'm a HashiCorp employee on the Nomad team.)
Vagrant and Packer feel like early alphas and while there is little competition, I do not feel comfortable using them. Because of this bad experience in the past, I have not even tried out Consul and Vault and am unlikely to do so in the future.