I think it'll take longer for whatever new products to have a noticeable impact. Sure, in percentages, the new HX flagship will likely rule them all in the higher end market, but in overall usage, it'll possibly not be too much of a direct change.
I mean, many people seem to be very happy with what they have. Myself included. If I had to keep just my two current rigs until the end of my guitar playing life, it wouldn't have much of an impact on my musical outcome (if any at all) or my incentives to grab a guitar and play.
Fractal owners seem to be largely happy with what they have, same even goes for plenty of Kemper folks and it also goes for HX users. So why spend more money? Not everyone is like some forumites always buying the latest and greatest. In fact, most players I know in reallife very rarely do, they just stick with what works and what they're familiar with.
And unlike 10 years ago when the first Helix launched, these days the market seems pretty saturated, and for many existing modeler owners there'd need to be some serious incentives to buy something new. Let alone that back then "quality" modeling was still pretty new, these days it's the norm. Even some lower end devices provide partially excellent sounds, even satisfying some quite demanding players. Add to this faster computers, better interfaces, easier DAW accessibility and the incredible amount of stuff you can get for dirt cheap or even free (think NAM) and unless they really need/want a dedicated hardware device, many people seem to be getting away just nicely (as would I in case I didn't have my live setups already).
So, while the Helix Stadium very likely is quite a step forward, looking at the big picture it likely will have quite less of an impact than the original Helix 10 years ago. It'll likely still outnumber the direct competition in sales, possibly by quite a margin.
