There are really three aspects to your project’s decision (to use React.js or not based on the BSD+Patents license), and it’s important to consider each of them. You really need to consider which aspects are important to your project’s success — and which ones don’t really matter to you.
(See the updated FAQ about the PATENTS issue on Medium!)
- Legal — both details of the license and PATENTS file that Facebook offers React.js under, and some realistic situations where the patent clauses might actually come into play (which is certainly rare in court, but it’s the chilling effect of uncertainty that’s the issue)
- Technology — are other libraries sufficiently functional to provide the features your project needs? Does a project have the capacity to make a change, if they decided to?
- Community — how does the rest of the open source community-of-communities see the issue, and care about your choices? This includes both future buyers of a startup, as well as future partners, as well as future talent (employees) or contributors (open source developers).