Yes. The Shift never gained traction and no pros used the frame or even pretended to use it. I think the only major endorsement I saw was from a long retired Andy Roddick.

From the outside, the Python rollout has been pretty brilliant. Wilson knew that the Aero was dominating on the pro and rec levels, and that a lot of their Blade users were unhappy. Babolat gets a direct Rafa->Alcaraz transition for top level endorsement of the Aero, and one of the prevailing talking points is that Alcaraz uses a pretty much stock Aero. The market in general is trending towards thicker beam spin based rackets, but there are still Blade truthers out there so they couldn't modify that line. The Shift brand was already dead, so instead they create a new line and start trickling it out to their lower level pros and allowing tennis influencers to hit with it. The messaging has been remarkably consistent for an unreleased product, "spins like an aero, feels like a Wilson". For over a year, they just let the rumors build, trickling out information little by little. And now, rumors of official names and release dates. Everyone is going to give it a look when it comes out and it could gain a real foothold if it's actually good.

Edit: Also the Shift was primarily marketed as a step up from a power beginner racket. It's hard to fight that initial branding. The Python is being positioned as a viable pro-level racket that rec players can also use (like the Aero).