It's not considered v1.0 and is not feature complete. 1.0 will almost certainly contain breaking changes. I've used it for some POCs and a some demos but nothing in active use, mostly for those reasons.
That said, it's hard to understate how amazing it is to get out of YAML and use a real programming language with strong types to build infrastructure. You'll want to do everything in CDK. If you're using AWS only, use AWS CDK and skip terraform. The additional layer offers nothing meaningful.
KetoChow is fantastic, but expensive - I've tried the rest, 2 years of soylent, months of huel, sampled a few other types. KetoChow is leagues ahead in terms of flavor and nutrition profile (very low carbs, high protein)