so… Ive been considering adding an OT to my setup for some time, due to the reasons being stated here… but keep resisting, thinking its ‘GAS’, so the arguments posted here, have been going around my head for a few months now 
so, I get the Juno/MS 20 immediacy… I have similar thing with my Virus and to a lesser extent my Spectralis.
But I slightly question it for the OT given its ‘complexity’, and the posts here, it seems many spend a reasonable amount of time ‘setting it up’… ok, once done it can ‘just be used’, but one can argue the same of a ‘Live template’ - no?
Recently, Ive been using Live/Push much more, and in a very simple way:
Drum rack, Midi in/out tracks (to Virus), External audio in (from Mix so Virus/Spectralis) and then a couple of my ‘go to’ VSTs (Aalto, Diva) and my send tracks setup with my favourite reverbs etc.
because I know this ‘setup’ is fixed, Ive got it as a template (but it only took about 3 minutes to create anyway), so I start Live, and Im up and running immediately, its simple to use, track switching on the Push, triggering record via foot pedal, perhaps use the sequencer for the Diva, tweaking a few synth parameters … play using my normal midi controllers (Soundplane) - really, never reaching for the mouse, or looking at the screen.
*the new thing for 9.5, is now I can load my saved AU presets for Diva/Aalto, which tended to be the thing I had to do with the mouse at the start of the session
I recognise, this is only possible because Ive restricted my environment… but surely no more than hardware does (e.g. the A4 only has one synth)
so… this is what stops me buying the OT, surely if you ‘tie down’ Live/Push then its no less immediate, its not forcing you to endlessly browse VSTs/samples…
for me at least, I do wonder if its a folly for me to buy (more) hardware to impose constraints/limits, when perhaps I should just be exerting some self control, and using what I have which has all the capabilities.
of course the advantage of this approach, is moving to the polishing stage in the DAW, is more a ‘state of mind’ (and perhaps physical move back to the screen/mouse)
so… Ive ordered a Push 2, to replace my Push 1… in the hope to streamline this more… Ive not traditionally done alot of audio editing (hence Push 1 limits in this area were not a bit issue) but It will be nice to open this up even if its just to ‘tidy up’ the looped audio coming in from my Virus/Spectralis.
so my question is:
Is it not possible to simplify a setup, such that it can be entirely controlled from a controller (e.g. Push) ? and with such a simple setup, tailor it to be act much like a ‘dedicated’ interface?
after all, the octatrack is essentially a (small) computer with a dedicated interface and OS.
note: I think its still nice to have some completely standalone hardware, so you can just switch it on and play without complication… or perhaps i should just get a piano 
(note: I deliberately avoid the digital/analog ‘sound’ debate, and of course, there is an assumption you are already ‘invested’ in software/computers… because the cost is no less that hardware imho)