ljcool_17 :
That's what I did with my PS4 when I first got it. Upgraded it with a 1TB SSHD from Seagate. Still works like a charm. But I was curious about upgrading to SSD to I did a few searches and found a lot of people have done it with no problem regarding support for TRIM. So I'm curious if there's really no problem with it.
I don't think there is. SSDs and Trim are designed for Windows which constantly writes to the drive, even when just surfing. The operating system of PlayStation is UNIX based (Linux for PS3, FreeBSD for PS4), and only necessary and/or user defined file writing happens (installing games, updates, patches, saving in-game data info, etc). You do not get cookies and other crapware loaded on your drive on the PS3/4 like you do on a Windows O/S PC.
Note how you never have to defrag a regular PlayStation hard drive over years of use....it never slows down. Trim is the SSD equivalent of maintenance. I guess we'll find out after several years of PS4 ownership by people who have had SSDs in them.