Ask HN: What are the legal downsides of using ReactJS

[fruiapps]

Facebook recently came up with a new license.

My understanding is that you're only at jeopardy of losing your license to React if you sue facebook over patent infringement. AKA, facebook implements a feature that you feel infringes on a patent you hold, and you actively sue facebook, then you lose your license.

The overly broad terms are the main problem. I have read across and found it difficult to interpret the clauses.

We thought of migrating to Preact[1] and were advised the following :

    what most people don't realize is that at least react contains a patent grant for 
    react related patents for you. Preact comes with no such guarantees and most likely 
    infringes a lot of those same patents -- without you having any kind of promise that 
    facebook won't sue you.

    You're more likely to get sued for patents if you use preact (or inferno etc).

What are the general understanding people over here have, in terms of using and not using React JS, not technically but from a legal perspective.

[1] - https://preactjs.com/