The post discusses the potential of using SDL2 (Simple DirectMedia Layer 2) for developing applications on the classic Mac OS 9 platform. Commenters express excitement about the resources available for classic Mac development in today's time compared to the past. They highlight libraries like Retro68k and frameworks like ScummVM that facilitate the creation of new apps for legacy systems. Discussion touches on cross-compiling with modern tools and the implications of SDL2 support on running Mac OS 9 in virtual environments. Some comments emphasize the need for better documentation on SDL2 for newcomers.