Emulation's difficult, even for well-known platforms. Dosbox emulates a large variety of hardware, quirks in various DOS versions, and runs on a ton of platform

Emulation's difficult, even for well-known platforms. Dosbox emulates a large variety of hardware, quirks in various DOS versions, and runs on a ton of platforms, but it doesn't do any of those things absolutely perfectly, and there's room for improvement in its hardware support. Plus, compiler and environmental changes need occasional maintenance.