[zorpner]

Can someone no longer run an emergency services PBX on Asterisk

They shouldn't have been doing this in the first place.

If so, what does that mean for the future of open source, and how come it hasn't been a problem until now?

It means that if you want to pretend you're making safe, reliable software, you (or your company) need to be prepared to accept liability for failures of performance. Actual engineers are actually responsible when their products fail. There's a reason we don't build bridges out of a thousand random packages we downloaded from a not-particularly-secure repository in the name of moving as quickly as possible to try and get the next VC dollar.

[monsieurbanana]

Oh yeah, because it's the devs that are running after VC money.