It is a shame really that a company who dominated so completely simply cannot be bothered (or can see no economic benefit) to at least maintain some sort of comparable product.
Dennis
A TOTL from Roland ain't gonna happen, in my opinion, as Yamaha and Korg have the high end, and mid-high end pretty well to themselves, and most previous Roland users wanting more than the low-mid end can provide (playing samples, more robust keys/keybed to name a few), have migrated to one or the other, and of course, Ketron, especially since AJ's powerful upgrades.
Tyros4 and Korg PA3X appear to be doing very well, for those seeking the very best in TOTL arrangers, and the mid-high, and some of the low end, has really come along nicely, with terrific interest in S950/S750/S910/S710, Korg's new PA-600, and even the PSR-E433 entry level is doing well.
I suppose it depends on the area...arrangers never really took off in certain parts of the USA and Canada, and in Canada, for example, the East Coast (including Newfoundland) and Quebec are the most prolific arranger users/buyers. The Tyros4 ( which sold more than all earlier Tyros combined), has recently become very popular with pro studios (sold three in the past short while), and, no doubt Korg PA are as well, as the word gets around that these puppies aren't your grandpa's big old Electone or overpriced Atelier...they can produce some awesome demos and finished recordings in a very short time.
One of my bosses told me that
Australia was one of the last holdouts for Yamaha Electone instruments, which are now pretty well confined to Japan...maybe that's why arrangers seem to do so well there, although for some reason, they sell very, very few in Japan.

It's a shame Roland has slipped away from a relatively (depending on area) lucrative market (the reasons for which are known only to the company's top brass), as you have to sell a lot of low-mid range arranger keyboards to equal the profit on one TOTL instrument.
Ian