There is again a lot of hearsay going around here, so little real knowledge is being passed on. A floor heating system, when operated with low supply temperature and small hysteresis, is definitely not noticeably warm.
I know that our floor heating system here currently is certainly far from optimal installation and configuration; but everything was carried out by a certified heating specialist company!
The floor in the bathroom is currently warm, which I find cozy in winter, but somehow it mostly feels rather random; in the second bathroom it is often different. Then it suddenly gets cold, which is less pleasant on tiles. When the sun comes out soon, I can only stand it during the day if I throw all the windows wide open and thus waste heat that was expensively generated.
As a resident of a new building, I simply want things to work and for ME to feel comfortable; temperatures are, of course, perceived very differently in everyday life. For example, if all rooms always have approximately the same temperature, that is the opposite of comfort for me, and when I am still at the mercy of the system-induced inertia, that is almost a knockout criterion for such a heating system.
However, I understand that 90% or more of people find supply temperatures exactly as absolutely fitting, but for me it remains a matter of pros and cons. Therefore, I would describe a floor heating system as a "standard" (because it is currently installed predominantly) but by no means as a "must-have," without which comfortable living would not be possible.
After having read the countless and lengthy technical dramas here in the forum, it quickly became clear to me that I want it differently. If we had a gas connection in the street, that would have been exactly it and probably without floor heating. The heat pumps currently installed as the "standard" fill even more problem threads in the forums and other online discussions because apparently, or unfortunately, the experience of specialist companies has not kept pace with the speed of technical development or the execution is often just done half-heartedly. If I then also build with a general contractor, someone installs whatever and I can only watch and hope......only to read here later that the system was foolishly installed or set up after all.
made an effort with his house overall, and when I read his thread about it, I understand how a builder gets annoyed if he is left more or less helpless.
What writes above is certainly technically correct, but honestly, I personally have no desire whatsoever to deal with something like that. I buy a car and just want to drive it without having to complete a mechanic apprenticeship first; what do I care about terms like hysteresis or doodads when I simply want it pleasantly warm. Just imagine having to engage for a long and exhausting time with every craft after moving in!
Sure, that was different for me "back in the day," but by now I can understand the neighbor of if he won’t feel like dealing with it at all over the next five years.
I do not have a perfect solution again but want to note that the currently installed "standard" does not satisfy everyone because luckily we all think differently.
Nowadays, time is almost fiercely saved by fast-running motors in venetian blinds, KNX automation, light without needing to turn it on; every second of life is time-optimized so that I then sit for hours, mostly frustrated and unsuccessfully, in front of my heat pump or incorrectly dimensioned floor heating. So savings happen at all costs.