If Inkscape is transferred to the Electron platform then it instantly runs everywhere - OSX, Browsers, Linux, Windows:
https://medium.com/@ole.ersoy/rewriting-inkscape-in-javascript-7e351738c37c
There are A LOT of Javascript devs. Could just open a github branch and see what happens.
On the surface, it's a fine idea, but then you quickly run into the fact that there is only one event loop so only one function can ever be running at once, no matter how many cores you have. Then you get into async hell.
If you want to port it to something, I would port it to Qt so that it "just works" across the board. Also there are efforts within the Qt project to support web assembly and all that. But ripping out GTK at this point is a daunting task, but at least you can map it mostly 1-to-1 with Qt, with Qt being a toolkit with cross-platform as its stated objective.