Fair comment but I think it's possibly just as valid in reverse. Mpc live and Deluge cram a whole lot in there. For me re vs DT I'm probably gonna occasionally wish the mpc had p-locks, that's it really.. Trig conditions are cool but not as integral/fun for what I do as a ton of stuff on the mpc that's missing on the DT. Makes the DT a total luxury item for me, whereas the MPC live looks like a huge practical workflow/productivity boost. I have an OT tho, so I feel kinda spoilt already when talking about DT..
But how long now til either the mpc adds p-locks or another hungry company like Deluge makers (or even behringer/Roland/korg/Ableton/NI etc) just nail it and totally beat down a bunch of Elektron boxes, who are quite careful with their inclusion of 'new' or amalgamated functions post OT, and throw everything Elektron does in there together at a great price. Gotta be not too far round the corner after the MPC has raised the bar.. Seems like the materials are affordable these days for people to put it all in there IF they choose to... DT could look like a VERY expensive next gen SP-404 sooner than we think... Either way it makes no sense to hold off buying something 'just in case' it's outdated. If it works for what you need now, cop it. Life's too short. Goes for both DT and MPC.
Re build quality, Yeh I'd love it to last 10/20 years. But at same time if it only lasts 5 or becomes outdated after that, but in that time it helps me make 5 LPs that wouldn't have materialised in the time without it, or do tours that would have been more ballache without it, that balances out OK for me. £800 isn't 'that' much for those returns..
At same time, if DT ticks the right boxes for someone, that's cool too. I don't feel like it's great value for money in 2017 from an established company, but things rarely are so I've given up complaining...Looks like a fun box but I have enough of what it does already covered + more in OT for it not to get me excited enough to Gas. Yet...