Windows 10 is a strong and able OS that receives regular updates to functionality and ease-of-use, but that doesn't mean Microsoft can't look elsewhere for ideas on where to improve.
Windows Central forum member MatthewR413 recently created a thread asking others what ideas they think Microsoft could "steal," namely from Linux.
MatthewR413 explains that a Windows 10 PC is required for using Office, but, in their opinion, Linux is still the best. As an example, MatthewR413 mentions the KDE neon distro, which (again in their opinion) has the best file browser for getting stuff done, even compared to Microsoft's upcoming Sets feature.
There's got to be a lot more Linux features that Microsoft could learn from, so if you've had experience with the alternate OS, head over to the forum thread and let MatthewR413 know what you think!