Earlier quoted context omitted.
>> Generally not the kind of thing for open source Hard to know in advance, if OS communities can do something well or not. There are examples of taking on pretty sprawling problems successfully. On multi Language, portability and such they can often beat the "armies."
Yes, but the problem with taxation is if you are couple of months behind the change in regulation, you are in violation and depending on the country, you need to pay fines. It's easy to have open source project where the stakes are "bad translation" or something that doesn't result in fines or problems with IRS/law.
I take the point that this is complex, but that doesn't discard OS/community by default. It's not impossible that community built OS could produce software trustworthy enough to be widely usable. FOSS has played in high stakes arena successfully before.
I would say that the point you and GP make demonstrate that "move fast and break" or "MVP" stuff can't be applied easily. That's not specifically something that impacts OS. It's just a difficulty of the space.