  Users of the La Silla Paranal Observatory have to rely on the ESO Exposure
Time Calculator (ETC) to prepare their observations. A project has been started
at ESO to modernise the ETC, based on a python backend and an angular-based
front-end. The ETC 2.0 will have a programmatic interface to enable the results
to be included in an automated quality control loop and to communicate with the
Phase 1 proposal preparation and the Phase 2 observation preparation tools, the
ESO science archive, as well as with scripts runs by external users or
instruments. The first version of an ETC 2.0 has been released for the 4MOST
instrument and further versions will be released over the next years for all
new La Silla, VLT and ELT instruments. The ETC of the current La Silla and VLT
instruments will also be migrated progressively, with improved instrument
description.
