Is it worth the hassle and uncertainty ? I guess that depends on what you store in the files, my UTF-8 encoded text files read by org-mode, is easily readable and information can be extracted without (almost) any effort.
Since I store my diary, ideas, manuscripts, cv's, contacts, meeting notes and a myriad of other things, I cant simply trust anything else with the data.
I've seen many cases with distraught persons realizing all their treasured data is locked into a obsolete format on a obsolete machine that just crashed.
I generate PDFs of my important OneNote notebooks, and I backup the file. It is not a complicated file format to have to worry about not having access to it for the data in future. Plain text is great and simple, but no drawings, mindmaps, photos, vector art, etc... which I can use in OneNote. My note-taking, journaling is more rich with the multimedia content. I used to use a TiddlyWiki, but I love using my Sony Vaio Flip 15 and pen to doodle, handwrite, or make lists.
Since I store my diary, ideas, manuscripts, cv's, contacts, meeting notes and a myriad of other things, I cant simply trust anything else with the data.
I've seen many cases with distraught persons realizing all their treasured data is locked into a obsolete format on a obsolete machine that just crashed.