I've lost some old documents due to missing support of old file formats. I guess it would be possible to find some converters, but then again I'm too lazy to pe

I've lost some old documents due to missing support of old file formats. I guess it would be possible to find some converters, but then again I'm too lazy to perform research on this topic, it is just like I'd like to look in one of those old documents from time to time (more personal history than actually important). So I tend to agreee with the approach of keeping things simple. However using a note taking app that operates on plaintext (markdown) files like Joplin could be a good middle ground.