"I do accept that it is a neat solution for someone who is out on the road, as it is probably quicker to set up, but it's not for me!"
Yeah, I admit it's the ease that works for me. That and the fact that I work entirely at the budget end of things. My PA speakers are mass produced Chinese ones that many outlets rebrand. Luckily they sound pretty good and I was able to get a pair of 280 watt 12" speakers for just over £300. Those with an Alesis Multimix 8 is pretty much my current PA set up!
If I need more than that I have a couple of very helpful mates locally one of whom owns a recording studio and another who does PA hire! Luckily for me, their kind natures mean I don't have to buy expensive gear.
Since I quit my last band last year I've only needed to amplify the session, so until my next band I'm covered!