Do you have a keyboard at all now? If not, it's ok to buy an SX now provided you can sell it later (without taking too much of a loss) if something else becomes available.

I am skeptical that arrangers will change drastically in the near future. If you look at Yamaha, for example, what differentiates the SX line from say the PSR 2000 from years ago? A couple of knobs, a chord sequencer, and yes a touch screen but little else. They have been reselling the same basic technology for years (Korg too). Genos is just a glorified Tyros with a touch screen. BTW, Yamaha HAD to add a touch screen because their main competitor Korg had it and even the old people that buy their products have them in their phones.

Roland has already gotten out of the TOTL market and is now selling one model that caters to all markets but mostly the overseas buyers. I am not convinced that Korg will not go the same way. They are late releasing the PA5X (or whatever they will call it). Some are blaming that on the coronavirus and they may be right or Korg may be revamping their line to look like Roland. I could be wrong though.

Ketron has the launchpad which is a true innovation. But each person has to decide if it will truly help what they do and there is a learning curve. Korg's innovation was Karma and I would dare say that fewer than 10 percent of the people at Synthzone use it. If you want to do the type of thing that Karma does, you will be more attracted to a workstation anyway.

I am staying put until something really new comes along (or my 900 dies), but I don't think that will happen.