Quoted from spidey:I think you need some RGB inserts to take advantage of modern code. It's very useful to identify mode shots vs multiball jackpot shots, which is key when you stack these, and you can rest assured there'll be stacking with new Lyman code.
I suspect any 'hardware upgrade' will need to be easily field installable. CGC would probably regret shipping a hardware upgrade that required drilling, cutting or re-wiring of anything significant. The skill set require for success would be much more limited in their installed base, and it would result in a tech support nightmare.