I was having a conversation with one of my colleagues about installing Windows 10 on his machine, then he suddenly dropped a bomb that installing Windows 10 would reduce the life of his SSD since Windows automatically defragments the SSD which reduces its life. I didn't find any concrete evidence of this theory, except for a few discussions about defragmentation on Reddit. Does anyone have concrete evidence on this theory?
Windows 10 recognizes SSDs and treats them differently than standard HDDs, meaning that there is actually no risk on damaging your SSD.
To quote Scott Hanselman
No, Windows is not foolishly or blindly running a defrag on your SSD every night, and no, Windows defrag isn't shortening the life of your SSD unnecessarily. Modern SSDs don't work the same way that we are used to with traditional hard drives.