For an every increasing number of tasks, VSC is nowadays the preferred tool of choice. It's faster, portable, lightweight and extension development is dramatically easier. That's probably also the reason MS is publishing more and more official toolings to it, mostly with higher priority than to the heavyweight VS pendants (if any exist).

Especially in the wide field of web/frontend development VSC is the preferred tool, just think of PCF or Portal development where well-established tool stacks from nodejs universe are involved and popular frameworks/libraries.

As of today, there is still no mature and production ready pendant to XrmToolkit for webressource/pcf/portal development and publishing in Visual Studio Code. This would be a perfect chance for you to establish your product in the VSC world. Not porting the whole product of course, but only those needed for webressource/pcf/portal development. Stripping away everything else, and maybe settling on Microsofts PowerApp CLI tool which seems to be their long-term (?) strategic tool geared towards devs/customizers/powerusers for bringing DevOps and a better publishing experience to the masses.

I am using your tools for almost 7 years now and would be glad to have it on my toolbelt also for the next years.