While the 'Pitfalls' paper was implemented on top of the Testarossa compiler technology (that underlies the OMR compiler technology), the OMR project has spent a lot of engineering effort to make the technology more modular and easier to interact with.

While it doesn't invalidate the reasoning behind the 'Pitfalls' paper, we think that we're addressing the problem in a fairly different manner: Instead of providing a fully featured JIT compiler that you need to wedge the language into, we've instead chosen to create a more modular system that lets the JIT compiler be more customized to the target language and VM.