I had a very old DOS formatted diskette and when I tried to mount it on Linux, FreeBSD and got a panic.
NetBSD just came out with rump and I did some reading and gave it a try. I was able to mount after a couple of attempts and copy about 90 % of the Text File (a large file). No panics except under rump, but main system was happily moving along.
That's multi-platform as well.
If you want/need the same packages on Linux, macOS, other, then you can use the same code on all of those platforms. No needs to worry about using {Homebrew, Macports} on your Mac and {Deb, RPM} on your Linux infrastructure.
Big is it runs on nearly anything. If you like odd/rare computers netBSD is probably the only modern operating system choice you have. Collectors like it. As do people who run an environment of mix computers [for whatever reason] as the common OS makes it easier to remember the obscure options of whatever program they use.
If you stick to the common x86-64 systems Linux is going to have better driver support and more optimizations (some of those optimizations would be a pessimization on something else - a tradeoff Linux can make but netBSD cannot), and of course Linux has the most mind share and so there are a number of programs that won't work though nothing very common. I would have put ARM in the list of ones Linux is better on because odds are you are interested in one of those - but ARM has lots of obscure variants and so there is a chance NetBSD works better there.
Long ago it was said that BSD is for those who love unix, Linux for those who hate Windows. While the tone has moderated a bit over the years, there is still some truth to the idea that BSD sticks closer to the unix roots (whatever they are).