Redis is arguably the most well regarded tech of all. My impression is that not even PostgreSQL has the same kind of positive aura around it. And of all tech available Redis is at the top of things you "need" to have in your tech stack. Maybe this will change with their latest licencing change, but that remains to be seen. It's not difficult to see why, Redis is after all a very well architected and impressive piece of technology and this post is not arguing against any technical merits of Redis...