To be fair not much actual information has come out from this case, but does this set the precedent for vendors being responsible for security breaches?
Will we see Microsoft, Oracle et al being sued/fined when their products are compromised?
I admit information on PLEX isn't easy to come by, but it's a long stretch to go from "Ericcson invented the language" to "Ericsson must have been involved". Plenty of people work with the language (there are jobs advertised asking for PLEX experience) and frankly there must be plenty of state intelligence services familiar with the workings of it, especially given how widepsread its use has been over the last 30 years.
I can fully understand Vodaphone being fined so heavily, but I fail to see what warrants Ericsson being hit too.