Very much so! It was only last week I made a submission about porting a trivial text-adventure game (which I wrote) from CP/M to the ZX Spectrum. The features

Very much so! It was only last week I made a submission about porting a trivial text-adventure game (which I wrote) from CP/M to the ZX Spectrum. The features I have available are laughable, even basic things like entering text have to be done "by hand", no readline, no sounds, and doing everything manually is a recipe for confusion unless you're very careful. Still fun to play with such machines though, even now, and some of the games hold up pretty well even if we ignore the nostalgia component.