Re: 'Cold fusion'; 'string theory'; 'quantum computers'; 'telekinesis'...
And D-Wave didn't have any prior expertise in general-quantum-computing systems. Quantum annealing is a significantly different beast. So they pretty much saturated the limited market for QA machines, became Yesterday's News (and were over-hyped then), then climbed onto the heavily-overloaded GQC bandwagon with no real differentiator. They're up against organizations like Alphabet, which of course has the attention span of a three-year-old but lots of cash to burn, and a number of research universities which are being fairly aggressively funded by their local governments. That's not a good position to be in.
Also, as people like Scott Aaronson keep pointing out, even if we get largish error-corrected GQC machines in the near future, what they'll mostly be good for is simulating physics. Which is a Good Thing, but again it's a limited market. Algorithms in BQP like Simon's, Shor's, and Grover's don't have a ton of real-world applications.1 Other algorithms like QAOA haven't actually been proven to have any quantum advantage. People trying to develop error-corrected GQC systems love to hype the technology by hand-waving at other hard problems, but it's largely bullshit.
1Breaking cryptography with Shor's requires a big QC machine, and will only be useful against particularly valuable targets even then. Still a very limited market.