With open-source software, a license is as much a social contract as it is a legal one. People contribute because they want to be part of a community building something which is beneficial to everyone. Everyone contributes where they can, and in turn takes what they need.
Redis Ltd. broke the social contract. They decided that the short-term profitability of the company was more important than the project as a whole, the community which had grown around Redis and the future of the software. Probably a wise decision from a business perspective, but that doesn't make it any less of a rug pull from a community perspective.
You're right that no pre-relicense code was lost. People could and did fork. But something far more valuable was lost: the community's trust. First they relicensed the code solely for their own benefit, now they tried to take over third-party libraries and started behaving in a hostile way towards the community forks. Why would anyone volunteer their time and effort when it is mainly going to benefit a company which is so openly antagonistic against its volunteers? After all, what's the next shady move going to be?
Redis Ltd. broke the social contract. They decided that the short-term profitability of the company was more important than the project as a whole, the community which had grown around Redis and the future of the software. Probably a wise decision from a business perspective, but that doesn't make it any less of a rug pull from a community perspective.
You're right that no pre-relicense code was lost. People could and did fork. But something far more valuable was lost: the community's trust. First they relicensed the code solely for their own benefit, now they tried to take over third-party libraries and started behaving in a hostile way towards the community forks. Why would anyone volunteer their time and effort when it is mainly going to benefit a company which is so openly antagonistic against its volunteers? After all, what's the next shady move going to be?