i like where this could go. Roland/Boss no longer supporting 13-pin? No problem. Don't like audio quality shortcuts causing fizziness? Dive-in and make the trade-offs yourself. Feel like trying your hand at pulling apart a 1/4" composite guitar signal? Have at it. Want to include true 13-pin out, after alt-tuning? Just ensure the output DACs are there.
Granted, the guys who make Roland/Boss DSP, Axe-FX DSP, Line-6 DSP have a big lead that would be tough to catch-up with.
Perhaps some crowd-funded open-source development, to help the guys-who-can spend "quality time" working the projects.