  Users of astronomical observatories rely on Exposure Time Calculators (ETC)
to prepare their proposals and then their observations. The ETC is therefore a
crucial element in an observatory's data workflow and in particular is key to
optimise the use of telescope times. This is also true for the La Silla Paranal
Observatory and ESO has therefore embarked in a project to modernise its ETC,
based on a python back-end and an Angular-based front-end, while also providing
a programmatic interface. This ETC 2.0 has now been implemented for all the new
Paranal and La Silla instruments (CRIRES, ERIS, HARPS/NIRPS, and 4MOST) and
work is ongoing to implement it for MOONS. All the current ESO La Silla and
Paranal instruments will also be migrated progressively, and the first one has
been FORS2. The new ETC2 is based on the Instrument Packages, which should
allow in the future a smooth interaction with the Phase 1 and Phase 2
observation preparation tools. Moreover, the ETC 2.0 framework has recently
been upgraded and makes now use of the NgRx/Store technology in the front-end.
