Ask HN: What's the latest and greatest being used in tech?

Tools like Kafka and Temporal have been gaining a lot of momentum lately - the former already has some reputation with the latter gaining a quite a following lately.

Usually I go to Thoughtworks Tech Radar to get myself informed but more often than not I find them to be a bit behind or have a more conservative view of what's trending in companies.

So I thought would be a good idea to ask around what people have been using these days that is making their life easier or that solves some real engineering problems or make difficult problems easy to solve, etc