OpenBSD actively goes the extra mile in creating new security mitigations and ideas and the developers have always raised the difficulty of finding a 0day in the default install of OpenBSD. They are the creators of OpenSSH, kASLR, pledge(), W^X, etc and some of them are also the maintainers of LibreSSL.
You can still 'think' OpenBSD is more secure than FreeBSD, but I know it is still more secure.
I run quite a lot of stuff on OpenBSD and it works for the most part fine. Sure if you are running Netflix or something at mega scale it probably won't be any good, but it works quite well for a lot of hosting scenarios.
I can make a pretty decent desktop OS as well.
Iridium works, html5 video works, so do the videos under MPV. I've heard succesful stories from OpenBSD users with Vulkan under MESA. Even amdgpu works, but the -current release is better for that.
PPSSPP and some C# gaming works; so does N64, NES, SNES, PSX and even maybe DC emulation. A PS2 emulation is WIP, and it's not PCSX2. Then there is Dolphin, Nethack, ScummVM, lots of source ports...
You have LibreOffice if you want, among a lot of known ports https://openports.pl such as Python3, R, Node, and so on. No Netflix, but maybe with fake mobile UA's under Chromium you can override the DRM.
CWM+XClock+Xlock as my "DE". I don't need more.
That’s the power of freebsd. Not security.