The OP suggested that no web/Electron based editor could have "complex vector editing, gradients and co on screen". This has nothing to do with achieving 100% feature parity, so yes, we can tell. Anything else is moving the goalposts.

100% feature parity is a meaningless test in any case. Sketch doesn't have 100% parity with Inkscape, which doesn't have 100% parity with Affinity Designer, which doesn't have 100% parity with Illustrator, etc.