I also use it, have been for about 6 months now and its been a joy to learn and work with. I really like the ability to use typescript and all its helpful bits and tooling for a domain as large as infrastructure on aws. I think it makes infrastructure more accessible to devs who have never had to look at a yaml file for weeks on end or had to learn some DSL that wasn't a general programming language.
Really hoping to see other cloud providers start creating their own constructs in the future
Yes, I use it and find it helpful; was much nicer using a regular coding language to build the infrastructure than learn another domain language,
Yes! At our company, we're currently building our backend infrastructure solely in Serverless Stack (https://serverless-stack.com/). It provides some nice higher-level constructs and build processes for serverless infrastructure while still allowing you to use everything else CDK has to offer. It's been a joy to work with and at this point I wouldn't want to build infrastructure any other way.