Wittgenstein is like a rock band that abruptly changes style at some point in their career, alienating many of their fans but gaining new ones. One of my philosophy professors used Radiohead as an example, with (I believe) OK Computer as the turning point, but I don't know Radiohead well enough to judge that particular analogy.
I'd agree that the turning point was OK Computer. While that record shows that the turning point wasn't as abrupt as it's often made out to be, OK Computer was the first time a lot of Radiohead listeners went 'huh?!' and either accepted or rejected this new direction. Kid A just affirmed this new direction as more than just some 'influence'.
This is really interesting in the context of that link: if I remember correctly Wittgenstein renounced his previous ideas on language after working for a few years in an elementary school. Some think that this change was prompted by direct observation of how language is actually learnt.
However it might be the case that what he wrote in the Tractatus is still relevant for formal languages, such as programming.
Except by Wittgenstein himself, who largely renounced this philosophical project in the second half of his career. Still essential reading, though.