> For example, my oldest files were made in Microsoft Word on an iMac G3 running Mac OS 9. I can open them in a modern word processor, and they look similar – but it’s not the same. Some of the fonts and graphics are missing, and I don’t know where I’d find replacements. > It’s even harder for an undocumented side project I abandoned years ago. Having the code isn’t the same as a working application. The author's sol…
You'd need to keep an entire old, un-upgraded Mac around just to have a chance of doing that without MAJOR engineering work!