Usually, such companies have quite high price for such contracts and I think it's not worth is. While technically it might be superior, it has small user base,

Usually, such companies have quite high price for such contracts and I think it's not worth is. While technically it might be superior, it has small user base, smaller talent pool to hire from, less books/documentation. All this happens because people want to make money in an old fashioned way. The better option is to use, the most popular open source tool which in this area is GWT or TypeScript.