Commuting in your light plane to soar above the traffic jams? Don't think so.
Trouble is, unless you are IFR with at least 2 engines and a night rating, you will always be at the wrong end of the journey when the weather turns duff.
I would agree that
reliable commuting using light GA is an illusion, but if you spend enough money on the hardware, and enough time+money an acquiring the papers to fly it, you can do it.
2 engines are however not relevant to weather capability; you can get perfectly well equipped singles. Something like a Cessna 400 will be pretty good; a Jetprop or a TBM will easily deal with frontal weather.
But in the end you will get shafted on airport opening hours - unless you do it between H24 airports and that will be super-expensive in N Europe. There are cheap H24 airports in the south.
Robert Maxwell used to commute in a helicopter, with a professional pilot.
Within the UK, or within any country in Europe, a heli is always going to be better than fixed-wing, not least due to airport opening hours, but you pay an awful lot of money for a capable one (millions).
Commuting works much better in the USA, due to airport opening times and a lot of instrument approaches. This will probably never happen in Europe, and definitely will never happen in the UK because privatised ATC will prevent GPS approaches setting up at small airfields.