Yesterday, three members of Microsoft’s quantum team presented their work towards a topological quantum computer at the APS Global Summit in Anaheim. Last month, the team made waves announcing their first topological quantum chip, the Majorana 1. More quietly, Nokia Bell Labs has been working on their own version of a topological quantum computer, and the company claims it’s demonstrated the key ingredients in 2023. Both efforts represent scientific achievements, but bulletproof evidence of a topological quantum bit is elusive.