It would be, if I could discipline myself to carry it around on a thumb drive --- the one time I tried that, I left it in a computer at work and when I got back the next day, it was gone (really hated that job/workplace).
Since I have to have a Wacom EMR stylus on my devices, no iOS here (which I'm kind of bummed about) --- it kills me that I mislike the Apple Pencil (and that Apple won't make a stylus-enabled Mac, or a device w/ an e-ink screen).
(I know Tiddlywiki is just an html file) but it syncs it and makes using it quite smooth. I think it can be synced with iCloud or whatever