MilliForth-6502 is a compact implementation of the Forth programming language tailored specifically for the 6502 microprocessor. Given its reduced size, it's positioned as one of the smallest Forth variants available, enabling efficient resource usage on constrained systems. The mention of it potentially being smaller for the 6809 signifies interest in cross-platform compatibility and further optimization possibilities in legacy hardware contexts. The compact size of MilliForth-6502 makes it particularly appealing for embedded systems and retro computing enthusiasts. As demand for lightweight solutions continues in areas such as IoT and embedded programming, tools like MilliForth can create opportunities for innovative microcontroller applications. Additionally, the conversation highlights the ongoing interest in optimizing programming languages for older architectures, suggesting a niche but passionate community around such developments.