If you use it with every basic extension, like Kubuntu's default setup, then it's really bloated (Akonadi and MySQL is a dependency for KMail), but thankfully it's highly modular and enough fast for my taste.
Microsoft still the largest software house. Of course Google is bigger on the web, but this doesn't make MS automatically a better choice even if it's fancy to call MS a trustworthy company as they invested few millions (out of billions) into FOSS ecosystem, basically because their cloud platform, meanwhile do everything to destroy competition everywhere else.
I want kernel modules back in openbsd. Of course they gonna ignore it for reason, but you know... easy come, easy go.
Netflix uses Linux too and Sony heavily dumbed the kernel, to decrease the attack surface. It's practically pointless to call it as an os.
ZFS is also available for Linux and of course it's better to use it on Illumos. I wonder why Netflix chose FreeBSD and not Solaris or Illumos.