There is a real cost to supporting old architectures and associated risk in telling users they can run production workloads on them.

There is also a real cost to dropping support for software working perfectly fine.

When a big company explains away how they are not doing something because of engineering resource constraints, put your skeptic's hat on, it's likely an exaggeration.

You can still use emulators on macOS Catalina (the version that drops 32-bit support.)