As long as the majority don't care about the erosion in build quality, chasing after lower and lower prices and better and better sound at all costs, this trend will quickly spread.

As Ian keeps pointing out so gleefully, Yamaha arrangers are designed and meant to be home toys, NOT serious professional keyboards (unlike their WSs, that haven't seen the slip in build quality despite being produced overseas - as if EVERYTHING isn't produced overseas, now!). Anyone that expects otherwise had better be prepared to pay for higher quality, or at least start to make some SERIOUS noise in the way of complaints to Yamaha about inferior build quality compared to their (often less expensive!) workstation line.

But without a willingness to criticize your OWN arranger, Yamaha users are playing into the hands of the cost-cutters at Yamaha, and these shoddy build quality issues will continue. It's all well and good to praise Yamaha for it's sound and EXTREMELY light construction, but no-one should be unprepared for the issues that that standard of construction are going to bring up...

It will be interesting to see what proportion of S900's compared to MotifXS6's will still be fully operational in five year's time (well within a normal expected window of usage, IMO)...
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An arranger is just a tool. What matters is what you build with it..!