John Weiss wrote
Rod Speed wrote

I see a lot of "Radiant Floor Heating" with a rubbery tubing
stapled under the floor. SInce I tend to be in horror of any kind
of leaks, I wonder why they don't use some compresses gas instead?

However, you can also get under-floor heating that is simply
electric resistance heat. Not necessarily cheap or efficient, but
you don't have to worry as much about leaks...

But you can still get failures in that which while not damaging anything that matters, still need to be fixed if you
want the heating to continue.

So what?!?

So that approach has some real downsides in addition to the ones you listed.

ANYTHING is subject to failure!

SOME approaches are a hell of a lot easier to fix when they do fail.

The OP SPECIFICALLY said he doesn't want LEAKS!

The OP is completely irrelevant to the advantages and disadvantages of various approaches to radiant floor heating.