I am going now through course on typescript. There is a big portion of information about typescript decorators which were experimental on time of course recording - I believe that was few years ago. Are this feature still experimental or going to be not the nearest time?
Based on official documentation the answer is YES it is experimental.
Decorators are a stage 2 proposal for JavaScript and are available as an experimental feature of TypeScript.
Decorators are an experimental feature that may change in future releases.