To be fair, Microsoft did a really really good job with VSCode - it can easily search big files that Atom completely chokes on.<p>It does have a problem with files bigger than a few MB tho - but native editors like gedit chooked on that too so I can&#x27;t blame them too much.<p>And it has that smooth input animation that not many native editors have but it adds so much to the feeling of responsiveness (other editor I&#x27;ve noticed using this is latest intellij versions).<p>My point wasn&#x27;t even so much about performance, with enough effort you could work around most of the issues (at least in some browsers, kind of dumps on the idea of &quot;portability&quot;).<p>My point was that the whole GWT -&gt; JS this took or the coffeescript Atom took is such a pain on the ass to develop with compared to a real GUI toolkit - just think of the developer productivity without the stupid GWT compile times, special cases, etc.<p>Think how nice of a development expirience you would have with something like Kotlin + JavaFX, or C# and WPF.<p>I really really wish Microsoft would open source GUI stack from Silverlight and let community maintain it as a cross platform GUI framework for CoreCLR - they already had it running on OSX meaning it can run on non-windows tech - meaning the porting path exists, and a lot of work went into silverlight GUI controls historically, plus it&#x27;s WPF compatible. They could make &quot;portable profile WPF&quot; from it if they wanted, and also target mobile and desktop, from Visual Studio and Visual Studio Blend - the ultimate Enterprise app development platform