Very long ago, I think around 15 years ago, my first Nespresso was the Concept machine.
The steam wand is adjustable. Later I had a Krups with porta for a short while, forgot the model.
Unlike machines with a boiler inside to build steam, thermobloc machines basically vaporise droplets of water to produce steam. I was comparing with multiple different machines at Takashimaya and they had the same kind of result.
It's really not strong and iirc from my reading back then, thermobloc machines have an ascending thermal profile while doing the espresso. It kind of intensify the astringents at the last part of the extraction unless your dose is heavy and the initial moments where most of the goodiness are, are done at too low temperature. You can still taste the "espresso" but the flavours are not articulated well. Maybe no biggie if you are casual drinker esp if you drink with milk, but the steam was really cmi for us.
There are better thermobloc machines in China that preheat the water, but those are not cheap iirc that's why did not take off, think the steam power remains about the same or slightly improved. Thermoblocs are made of aluminium and leach quite badly while descaling. The wand that I had on the concept was often stuck with limescale.