ISAs aren't stable. Can you guarantee me that programs will be compiled for x86 in 20y? What instructions will they output to access the environment? Linux, Win

ISAs aren't stable. Can you guarantee me that programs will be compiled for x86 in 20y? What instructions will they output to access the environment? Linux, Windows, MacOS? Will any of these even remain in 20y? No standard last forever, your bytecode will ultimately deprecate and this is not a "developers should stop being lazy" situation. Why do projects dump compatibility? Because this is extra work. And no project can receive indefinite support. Simple formats do not depend on maintenance.