For me, the SB4.T is doing just fine.
I'm your average pencil-necked, fat-assed, paper-pusher office type, so it doesn't see any real rough use.
From the design and build criteria previously listed by Josh, it'll easily handle all that I have to dish out at it, plus more.
My only other truly worrisome production liner-locker is a Spyderco Howard Viele that I EDC's for over two years -- prior to my rather recent interest in customs or semi-customs. On this one, which also still easily passes spine-whacks, although the lock still engages "perfectly" -to- slightly left-of-center, the liner can be seen to visibly flex/bend with negative load.
So both my SB4.T and my Viele are a bit "concerning" to me right now, but I still trust them plenty for daily light-use as I typically expose them to.
And hey, you've got nothing to be ashamed of with your Buck-Strider; those are often refered to, even by die-hard Strider fans, as "1/2 a Strider, for 1/3 the cost."
Allen
aka DumboRAT