I mean, I guess that's more or less just a summary of the blog post, but it's true. And it will remain true until the fragmentation ends, and the fragmentation won't end until Microsoft gets its act together and ships their version of SwiftUI so that some sort of abstraction layer over SwiftUI/GTK/MsftUI can be created. And since Microsoft will almost certainly never get its act together, the problem will remain.
In other words, not a blip. The UIs of the present and future will all be Electron apps and TUIs.