Hi @Jeanroidumanche,
To further add what @StewyMacaroon80 and @SwoopGB wrote, there are 2 wishlist items you may want to up vote; as these features are not present when using sim rate:
- Indication on screen of current sim rate:
https://forums.flightsimulator.com/t/on-screen-indication-of-sim-rate/149632 - A reset button to bring the sim rate back to normal speed:
https://forums.flightsimulator.com/t/simulation-rate-reset-button/357538