There are issues in Europe with the financing of onboard equipment, and who should bear that cost. DB says it is paying €60,000 for an LZB/PZB unit today, but about €75,000 for ETCS hardware and the same again for the neccessary software (based on a 15-year life and not including cab display screens). There is also concern among some operators, notably DB, over the long-term availability of software and software obselesence, and this comes back to the issue of standardisation between suppliers mentioned above. SNCF says software developers are not railway specialists and introduce things that are not appropriate to railway use. They are also frustrated that new versions of the software are quickly superceded.