At least it seems like a lot more apps are cross-platform than before. I wouldn't call the native devs lazy for not making a Mac version of their Windows app.
Uphill both ways, should be easy for a company doing C compilers with LLMs.
The approach runs slower than a game written directly in assembly, but the cost to port to different architectures is much lower.
Sort of like Electron trades off native performance and look-and-feel to make multi-platform apps much more achievable.
IMO the OS vendors failed everyone by refusing to even attempt to agree on a common API for UI development, paving the way for web browsers to become the real OS and, ultimately, embedded browsers to be the affordable and practical way to be cross platform.
There's also stuff like lorca which shells out to an installed Chromium browser.
But I think even there it’s possible to encounter platform-dependent bugs - starting from view issues (you know, different OS can use different browser engines) and up to those related to system APIs.
Go figure what would happen when Chrome gets shipped everywhere, because writing browser agnostic code is too hard.