I’m with you there. Sure, if you get stupid and screw the valve all the way out, you are fucked and flooded. But to unscrew it completely, you’d have to exercise an overwhelming amount of stupidity.

Degassing radiators is a really simple operation - you either have a special square inverted key, which fits the valve or just use a flat screwdriver and slowly turn the degassing valve until it starts hissing. You let it out until the air turns into a very small stream of radiator water - but the stream is extremely mild and if you close it after a seond it does so, there’s usually no more then couple of drops of water.

I have no idea why there should be some sort of superheated steam like anyone is freaking out. Radiator water is usually around 50C if you have an old system or even lower if your heater uses new fancy equiterm curves. Nothing that would burn you.

Why do you seek “modern” alternative? As far as I know, it still applies in all developed jurisdictures. Together with presumption of innocence.

Ahh, perfect for my kitchen knife.