I used to work for a UN agency that was a bit weird about having clean vehicles. They were white (of course) and we had guys in the garage who pressure-washed* them constantly at the first sign of settling dust or splatter marks. That put me off pressure washers for life.
Bucket of warm water, a sponge, a rag and a brush. Pure heaven.
ven for MTBs or trail bikes, a good dousing with a hose at low pressure will ease the most concrete-like mud.
Also, you get to see developing faults if you're running a cloth or a sponge over a bike, motorcycle or car.
I'm not in the 'it screws your bearings' school, because I think you can be careful with aim. I just think it's another piece of technology that we don't need and which has very little effect in terms of making an already fairly easy job less unpleasant.
* We lost three Karcher machines in a few months. A year or two later I was back with a different employer and one of our former mechanics had opened a Car Wash in the next town.