Schlüter screed system - renovation with a low screed build-up?

Morning,
For my core renovation project (built 1961) I need a replacement for the installed screed with about 4.5-5cm buildup.

Now I have come across the Schlüter Bekotec system.
At first glance it sounds quite interesting, but at the same time a few questions arise for me.

It seems that there is no thermal insulation compared to the (concrete) ceiling itself, so I am heating the entire ceiling and of course also the adjacent masonry.

One advantage mentioned is that the underfloor heating can be controlled quickly. That makes sense since the screed itself supposedly is only 8mm thick.
This way I could implement a night-time (and absence) setback.
But I wonder if the heat pump will then have to cycle much more often (due to the missing storage effect of the screed) and thus consume significantly more electricity?

How about the load-bearing capacity?
Schlüter mentions high load capacities here, but says nothing about how these must be distributed.
I especially think here about furniture feet.

Actually it is said that any floor covering is possible, but still tiles are constantly mentioned.
How does it look with parquet/laminate (glued) here?

Does anyone of you also have a floor construction from this manufacturer and can say something about it?
So far I have not yet looked for a company that would install this system.
Should I continue searching for alternatives here, or is the system recommendable?

Becothec-EN or Becothec-Therm are special constructions that have meanwhile established themselves in practice.
That means: they work.
When are such systems used?
Well, on the one hand, there are object-related height problems, on the other hand critical subfloors that do not support, sand down, or are highly prone to cracking.
In short, subfloors that are not ready for installation.
In this case, you probably removed a screed, as far as I understand. There remain 45mm to 50mm.
The old screed, as I would like to call it, was installed - since it was laid in residential construction – quite certainly also with an insulation layer.
If that is still present and a construction height of 45mm is given, there would be no objection to a new (unheated) standard screed.
If the wish is to install a heated screed instead of an old, unheated screed, we actually reach the limits with the construction height. We need a nominal thickness of 60mm.
The Becotec system works there with the studded panel and a highly reinforced leveling compound, which builds up 35 to 38mm.
The problem with this type of warm water underfloor heating is the small diameter of the heating elements.
Common systems work with 12mm outer and about 10mm inner diameter.
With smaller inner diameters of the heating elements (pipes), logically, to achieve the same heat output as the larger diameters, the speed of the water flow must be increased.
This can lead to whistling noises in individual cases because the internal stress on the walls of the heating elements around the bends is quite high due to the high medium speed.
What result can be given to you?
I would take the risk of flow noises. Because otherwise the system would no longer be on the market.
With the load you requested, I would have no problem.
It is the case that in residential construction a surface load of 2kN/m² is assumed and then the point loads are negligible, as long as no unusual furniture, such as a piano, is expected.
Then you would have to work with load-distributing plates under the rollers.
In short:
With the usual traffic load in residential construction, there will be no problems with the load-bearing capacity of the Becotec system, especially since there is an additional load distribution due to the thickness of parquet or a ceramic tile, which cannot act pointwise on the leveling compound.
I hope I have helped with this explanation.
Best regards: KlaRa