I read that several high end spin bike have some level of compatibility with cycling apps, like Zwift. Somewhat told me that for extra money one can get an interface to Zwift on Peloton, and I think I read that top of the line Schwinn also has some ability to communicate with Zwift. Since there is absolutely no way how cycling apps can control resistance of a spin bike (in all spin bikes resistance control is mechanical, with a single red handle on the frame), you would not be able to do workouts in Zwift in ERG or Level mode - you would have to adjust resistance manually to reach target power. It is an open question if you would be able to use other cycling apps, like SUF or Rouvy, I never saw a statement that they are supported by spin bikes manufacturers. Well, I do not even know how Zwift will like a trainer which cannot be connected as controllable! I do not know if it will be able to pick up cadence, either.
This means, you most likely would have to forget about Zwift and subscribe to Peloton (their program can in principle be used with any spin bike, although without power data) and do their simulated spinning classes. This is a good workout, but it is a different experience.
Your question is half way to a question if you should sell your TACX and buy a treadmill. Road / MTB biking simulation and spin bike are quite different ways of exercising. None of them is better than the other. It is up to your preferences.