Traction is the most important for web startups because technology is not the limiting factor. There are a lot of teams out there that can build whatever. The p

Traction is the most important for web startups because technology is not the limiting factor. There are a lot of teams out there that can build whatever. The problem is mostly reduced to market-risk. Traction is a big signal that market risks are mitigated even when that may not entirely be true. Biomed startups have mostly technology risks, the problems are well-known and there is a very defined (and heavily regulated) goto market process. As the comment above mentions, the thing that gets investors excited in biomed startups is mitigation of the technology risk.