I'm 46, and I've been a half-assed gym rat for a lot of my adulthood. I started SS last winter, which was my first real programming. Since March I've been doing regular deload weeks, and I did one major reset in the fall. I feel sore and beat up sometimes (OK, most of the time), but the only thing close to an injury* has been some flickers of tendonitis in the knees lately, which I think I've got under control through technique adjustment. I'm still in the process of pulling my head out of my ass with these lifts, but they haven't killed me. And I'm much stronger now than I've ever been.
I did tear a soleus (I think) when I was 37 pretty much just standing there during a game of pickup volleyball. That was a proud moment.
* From lifting. I do sometimes get hurt, but that's always doing jujitsu.