I don't doubt that one bit. However It would be nice to see somebody offer up an open sourced DMM. We need this as users because of the one problem that is rather huge in the test equipment industry, that is a lot of manufactures just don't last. That is a company will flop before its hardware has ran through a reasonable life span. Beyond that I'm still amazed that we don't have scriptable instruments from the big manufactures.
There are literally hundreds of open source multimeters on the Internet. And they all went nowhere. Not to mention how safe is to make something you poke into dangerous voltages that Arduino maker will "hack and make better".
That pretty much highlights that there are no true open source multimeters. Further there is a lot more to the world of open source and even open hardware than Arduino. I sometimes see Arduino as enablement for idiots but that doesn't mean everybody that put an Arduino to good use is an idiot.
And what's with "don't have scriptable instruments"? All of them are, if they have any kind of interface.
Having an interface doesn't make the meter itself scriptable.
You need Raspberry PI, small screen, and write Python scripts for days... Graphing, logging, everything. I have a network share mapped, so files are accessible from PCs too... Ethernet, serial, Bluetooth, GPIB connectivity, you name it.
Also, DMM6500 from Keithley has built in scripting language and rather big screen. OTOH, unfortunately, it is also a living proof that Linux can also bluescreen all the time if you write crappy software...
So you have one high end meter to consider here. As for a blue screens you are right that crappy software is a problem, but even quality software will have bugs. That is why field up-gradable instruments makes lots of sense to me. It is almost impossible to ship reasonably complex software without bugs.
What is interesting to me, with respect to Linux and much of the software that runs there, is just how good it has become. Yes there are crappy apps, that are delivered by rather poor programmers, but that stuff doesn't stay in circulation long. Either programmer (often the project leader) gets better at programming or something turns up to replace it. Contrast this with Windows when you can get stuck with a crappy app with no replacement in sight, nor a way to get it fixed.
Is open source always the right answer, nope not saying that. However it has done really well in some case such as low end logic analyzers. The industry would benefit from more such successes.