> This is not the case, Redis is, and will remain, BSD licensed.
True, he doesn't explicitly say for how long, but I don't think it is unreasonable to read "will remain" as "will remain indefinitely" and not as "will remain so until we change our minds".
> I don't think it is unreasonable to read "will remain" as "will remain indefinitely"
That's a reasonable interpretation. But it involves an assumption on behalf of the reader, of words that are not there. I think it's a stretch to consider that specific post a "literal promise" by Antirez.
That said, I just did more research and must admit I am completely wrong with regards to the bigger picture there. My genuine apologies. In the HN commentary on that same post [1], the cofounder/CTO of Redis Labs (Yiftach) apparently made a much more direct statement that "Redis remains and always will remain, open source, BSD license". Due to use of the word "always", that I think can unambiguously be called a literal promise that was broken by the Redis company.
True, he doesn't explicitly say for how long, but I don't think it is unreasonable to read "will remain" as "will remain indefinitely" and not as "will remain so until we change our minds".