I still use MFC for Windows stuff. It's gotten "bloatier" though. it also take some effort to REMOVE! ALL! REFERENCES! TO! CLR! AND! OTHER! SUCH! BLOAT!
And I still use DevStudio 2010, the LAST one that was NOT all 2D FLATTY FLATSO McFLATFACE, which was ALSO oriented towards Windows 7, and NOT "Ape" nor Win-10-nic.
What I'd like to see is wxWidgets support, INCLUDING dialog editors, toolbar editors, menu editors, and other such things. THAT is TRUE cross-platform, very MFC-like (not 1:1, takes some time to port an MFC application to wxWidgets, but it CAN be done) and DEFINITELY suited for serious cross-platform application development.
I've run wxWidgets/GTK applications on FreeBSD and Linux. Should run the same on windows and Mac. In fact I put a nice "sort demo" written for wx out there on github if anyone wants to have a look. it was originally an MFC application, back in the 90's. It's since been improved.
/me points out, if you're going to haul around some monolithic library of excess, might as well static-link it and use something that's truly cross-platform. Sure you'll have to build a version for each OS, but with static link you get minimal dependencies and fewer support issues caused by anything resembling DLL HELL...
In any case, it would be _WISE_ to have wizards and editing tools for wxWidgets in VS Code. THAT might make it worth using, In My Bombastic Opinion.