My development is on Linux. Some of my work has to run on Windows as well; VirtualBox has several Windows VMs, a ReactOS VM, and Wine for testing.
I've never had to deal with the BSDs or Macs. If a customer was willing to pay for me to come up to speed on either of them I would consider it, but I have no interest otherwise.
I am slowly coming up to speed on Haiku, and now that most of my application and development software runs on Haiku and its hardware compatibility is much better, I'm looking to eventually move from Linux to Haiku for my primary workstation.
I've never had to deal with the BSDs or Macs. If a customer was willing to pay for me to come up to speed on either of them I would consider it, but I have no interest otherwise.
I am slowly coming up to speed on Haiku, and now that most of my application and development software runs on Haiku and its hardware compatibility is much better, I'm looking to eventually move from Linux to Haiku for my primary workstation.