Currently, I have one of each of all the Boutique series, plus an extra JP-08 since they were plentiful locally used/repackaged by Roland and cheap for a while. What I like about these is that each is simple (except the D-05) and completely self-contained. I prefer that to a keyboard workstation that tries to include everything and becomes way too complex to get my head around in a truly practical sense.
It seems to me that the JX-03 works well with the programmer added because the programmer itself was really simple to begin with. Those synths that have a more complex programmer may not fare as well trying to stuff it all into a Boutique packaging.
The question I my mind is whether Roland is done with this product line, or do the intend to continue it? Is it profitable enough for them, or was it just some sort of fad whose time in the market has come and gone? I have no answer for these questions because I am customer, on the outside looking in, with absolutely no "inside scoop".
It seemed with the marketing blurb about the SE-02 that there MIGHT be some more collaboration type products for the Boutique line, but I have not seen any further indications of more products coming.
I have said it elsewhere in this sub-forum, that for folks living in condos or apartments, the current Boutique products are a wonderful means of having a bunch of synthesizers, that would not be possible if we had to have the full sized versions. I am perfectly satisfied with what I have, and would not be disappointed if Roland chose not to continue building this product lineup. So, either way, I am fine. I am glad that I jumped on all of these when they have been available, but don't really care whether or not they become collector's items with arbitrarily jacked up prices such as has has happened with the JU-06 because I intend to hang on to mine for a long time. I have no desire to own any of the Yamaha or Korg offerings of similar products. There is just something about these Roland products that really have a certain gadget appeal.
I do think that the Boutique items that may not be in high demand now, probably will be as folks explore what they can do and discover their musical qualities, even with the A-01k. I consider myself very fortunate to have found one locally brand new in the box bundled with the keyboard as NOS, very cheap. I came to the party late because it took a while for me to truly get what these things are. I really had to scramble to find the whole set, but really lucked out because by then, many were showing up used/repackaged in original boxes by Roland at cut rate prices. Now, all of that stock seems to have disappeared, at least locally. I even got a Roland MX-1 mixer, fully boxed, that way too. Other than the MX-1, which can be used nicely with the Boutique series (thee is a YouTube video on powering the other 3 USB ports for the Boutique series), I have no interest in the Aria line. They are too large for my use in the condo to have a bunch of them, and they lack the gadget type charm of the Boutique series.
Tony