Yeah, and not only that - what about the telephony/mobile data stack ? If you check the Mer activity log you can see an awful lot of churn in that on an ongoing basis. A lot of it seems to be pretty low level & rather complicated stuff requiring domain experts.

This is frankly worrying me quite a bit as I have not seen this mentioned anywhere & it doesnt seem look like something where community can easily help due to the pretty specific knowledge & hardware required.