Are there really so many OS options these days? Everything is pretty much "a Unix" of some sort, or else Windows. There is a key difference between today and t

Are there really so many OS options these days? Everything is pretty much "a Unix" of some sort, or else Windows. There is a key difference between today and the period of the 80s/90s when we had true OS efflorescence. Back then, the real concern was compatibility of software and in particular file/data formats. These days we have so many data format standards and protocols that a lot of this interoperability is essentially system-agnostic. I think that's a huge advantage.