GNUser - you aren't a dinosaur, but just a bit different like me, who also uses ed.
I also use bc / dc and personally, I just dig the whole busybox thing.
I've done what you have, and for quickies, just grabbed binaries from busybox, or better yet, compiled the very latest whole hog, and installed them into my existing tinycore setup - making a "BB" directory, and putting it in the front of my path.
https://www.busybox.net/FAQ.html#getting_startedTo keep things straight though, I rename the busybox binary to busybox<ver>, and make softlinks to that.
I also make sure that if something funky does come up, I take BB out of my path so as not to file false bug reports in TC itself.
Personally, I'd love to see perhaps a "bb-core", which stays up with the very latest busybox in it's entirety for most everything as far as it can - even with the latest "unstable" busybox releases. I suppose that would be a cool project, but I can never find a round-tuit to get off my butt.