I've been running smartos at least since 2015 where I co-located my server. There have been times where I felt like giving up, but people like danmcd, jperkin and others always stepped in and fixed what needed to be fixed for LX to be usable and working. (Keeping java updated and running is hard, uphill battle. Thanks!)
I always ran a mixture of OS and LX zones and bcantrill's t-shirt with "Save the whales, kill your VM" made sense. I've used zones in Solaris 10 even before and they just click with me. FreeBSD's jails are nice, but far from it. And linux's cgroups are a joke. And using KVM/VMs for security containerization is just insane.
At dayjob, I've implemented multiple proxmox clusters, because we're linux shop and there's no way to "sell" smartos or tritonDC to die-hard debian colleagues, but I've managed to sell them ZFS. With personal stuff, I like my systems to take care of themselves without constant babysitting and SmartOS or OpenBSD provide just that. I don't dislike windows, I love UNIX. You could really feel those extra 20y UNIX had compared to linux.
I migrated all my stuff to proxmox for like 2 months. And then went back to SmartOS, because there was something missing ... probably elegance, sanity, simplicity or even something you'd call "hack value".