I think it's fair to say quantum computers don't exist yet, but there is plenty of hardware. Although we're still at the wall-throwing stage and nothing seems t

I think it's fair to say quantum computers don't exist yet, but there is plenty of hardware. Although we're still at the wall-throwing stage and nothing seems to have stuck yet. Even for the theoretical models, we have plenty of alternative models. The circuit model is the de-facto standard and a good thought framework, but there are real concerns about it maybe not to being the model to translate into actual hardware. (analogously, lambda calculus vs RTL) It will be interesting to see what alternative or new theoretical models pop up once the quantum computer's equivalent of the transistor surfaces.