No thanks. I guess that will render Helix abandonware, and considering the state of the world next generation of modelers will be something like 5000€.
Not necessarily. Imagine an at least sort of "modular", stackable system. The core unit would only feature the minimum stuff for it to make some sense in standalone mode, anything else could be expandable. And there should be absolutely nothing too fancy onboard.
1) Connectivity. Need some more I/Os? Connect an additional breakout box to a toslink I/O.
2) Switchability. Need more than the, say, basic 3 switches of the main unit? Connect your additional strip of switches. Or two.
3a) Controlability. Need more knobs on the unit? See (2).
3b) Controlability. Ditch all fancy onboard screens, especially touch screens. Give me a simple, great to read under all lightning conditions, monochrome screen that is super rugged. Who needs a tablet alike screen on the floor, exposed to stage divers, drunken singers and what not? And who needs a touch screen just there? Crawling on the floor to adjust things never makes you look smart, so don't even waste your time and my money for that kinda stuff. Instead, we need mobile platform editors. With those, you have a choice of size, price and placement - it doesn't get any better, really. If you really wanted, well, mount your iPad on your pedalboard - but nobody would do that, simply because (see above) it's the last place on earth where you wanted to operate a rather delicate touch screen.
With such a scalable system, you'd only have to shell out a bigger amount of money for the initial unit.
Ok, admittedly, within such a system, there'd be no room for 7 iterations of what is basically the same thing (in the case of Line 6: Floor, LT, Rack, Stomp, Stomp XL, HXFX, Pod Go) but possibly just 2-3 (Floor, Floor "basic" (less CPU juice perhaps) and desk/rack), but on the upside, that'd also mean less development and support costs.
The main unit would possibly be comparable to a GT-1000 Core in size and functionality. Then add to it as you see fit.