Question about De'Longhi Magnifica Start

I have no idea whether it really blocks. I descale about every 2 months with a coffee consumption of more than 120 coffees per month

In contrast to other machines, probably as long as you want. However, this is not recommended, as the quantity becomes smaller and smaller.
You need to allow enough time for descaling - at least 40 minutes, as you have to keep changing the water.
Also place two jugs and the outlets: With the (biscuit) shape in the video, it splashes all over the surrounding area.
https://www.youtube.com/watch