At any given moment I'm using about half the total capacity. I'm not regularly doing huge writes, but as someone who works with a ton of remote and local repositories, pulling/merging/etc. many times a day, I do end up doing a huge number of small writes nearly continuously; I'd be surprised if I haven't hit every bit of that drive at least once by now. And I haven't seen any dramatic, or even noticeable, degradation.

And this isn't just some kind of spin from Anandtech

It's more that a bunch of people skimmed the anandtech articles, then started spouting a lot of gratuitous "X25-M is the One True SSD, everything else is shit" hype, which later morphed into "never use an SSD in an OS that doesn't do TRIM" hype. Of course, the hype doesn't quite match the reality...