I guess Roland have always assumed that their G-series WAS specifically for pros, who already have a sound system, and play at volumes that no on-board speaker system is capable of. I shall regret the day they take any notice of the hobbyists' and home players' needs, and produce some flimsy light-weight keyboard with little durability.
That is what the E-series and EXR-series are aimed at.
As you can tell from most posts here, few (if any) are willing to lift the 40+lbs of the PA1X or G70. But, OTOH, few are willing to pay those prices either.... For their target audiences (seems to be mostly background or retirement community jobs) these light-weight sounding as well as weight home keyboards do just fine.
But some of us are still in the trenches, doing the same kind of gigs any other professional keyboard player is playing - bands, duos, nightclub and big functions. The sort of place you'll normally find a big workstation and racks of gear. For us, weight is not so much of an issue. But durability and playability ARE.
Many feel that a 61 note keyboard is good enough. And for them, apparently it is. But if you are a working pro, you have to have the tools to be able to do ANY job you get thrown. Unfortunately, a 61 note does a poor job of full piano work (a 76 is a stretch, but it CAN be done), and is problematic when split. I prefer to have ONE keyboard I can trust (and get to know intimately) to do ANY gig. Or I start to have to carry around more than one keyboard. Talk about a weight penalty there!
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An arranger is just a tool. What matters is what you build with it..!