Cross platform is a key feature. Thats why glfw is so nice. Unless you want to write the grungy windows bits for all your platforms I don't see any problem with useing glfw. Its a solid library.
GLFW is great, but it's limited to GL or Vulkan as 3D backend. There's a context-less mode now (created for Vulkan I think), but I haven't seen GLFW used together with D3D or Metal yet. It's fairly easy to rip the relevant window- and input-handling code out though.
