Comparison of Rigetti and D-Wave for quantum plays. Rigetti is focused on pure R&D with lumpy income but potentially higher upside tech. D-Wave is commercializing sooner with hybrid systems and has a longer cash runway. The real issue is that general-use quantum computing might still be 20 years out. Neither company has the cash to last that long without significant dilution. The article suggests avoiding both pure plays and looking at Alphabet instead, since they have the resources to fund the research indefinitely.