I like that it's simple to use and that there are multiple options for deployment (on premise, cloud, etc.). It's not as easy to configure without using their GUI but you can always work around this with shell scripting. We have used flagsmith on several different projects over the last few years. The most recent one was running in AWS and included an integration with GitHub. This allowed us to set up code reviews for pull requests. I do not believe any specific feature has been discontinued from them. As far as I know, the only difference now is that they are self managed rather than being hosted by Redhat. There will be a transition period for moving away from redhat support. If you are looking for a way to manage configuration settings or feature flagging in a secure manner, then you should consider flagsmith. They make it very easy to get started, especially if you don't want/need a complex solution.