For those who have "old" Macs and want to upgrade or have upgraded to an SSD, this is good news.
By all means, if you have a third-party SSD in your Mac, or are adding one in the future, do enable TRIM.
Note TRIM requires a direct SATA interface. From much research, I have found no way to pass the TRIM command over USB 3 or Firewire. It is possible, but hardware dependent and not universal, to pass it through TB as is done by the SoftRaid system once TRIM is enabled on a Mac.
Synology's latest OS (which I presume is customized Linux?) provides TRIM internally, possible because a Synology is a self-contained system. No idea about the other commonly used high capacity NAS, the Drobo.
I almost hate to post this link. But it does provide an example of the Terminal instruction.
sudo trimforce enable
It also refers to one of those scary "internet reports" which has been picked up and repeated without folks "looking under the hood."
Algolia provides embedded search services, and its Blog is appropriately named "Milliseconds Matter." To reduce Milliseconds, Algolia used SSDs, running in RAID, in Ubuntu Server, on hosted hardware.
Let me rephrase that. Algolia used consumer grade SSDs
in RAID on Ubuntu Server to run its high intensity, high usage, high speed search engine on hosted servers.
Then screamed foul when the consumer grade SSDs malfunctioned.
Now they're paying a lot more to run their software on Intel Enterprise Grade SSDs.
So, what does that mean to you and your Mac?
The Samsung 840 Series has had firmware updates. It is possible to install those updates on a Mac. I've actually plugged 'em into a Windows Box via an unused SATA plugset, where Samsung's "Magician" Disk Management software is at home and easy to use.
If you have a Samsung 840 (or 830), checking for a firmware update would likely be a good idea. http://www.samsung.com/global/business/semiconductor/minisite/SSD/global/html/support/downloads.html
But unless you're using your Mac as Algolia did their SSDs, the takeaway isn't "TRIM Terror," but to backup, backup, backup. All our hardware, new, old, whether SSD or HDD, is subject to FAIL without notice.
The "clickbait link" spreading "SSD FUD:"http://www.extremetech.com/computing/209119-new-apple-os-x-10-10-4-update-enables-trim-support-for-third-party-ssds
Algolia original Blog: https://blog.algolia.com/when-solid-state-drives-are-not-that-solid/