This was so nice to read, I've been trying to encourage my friends to write their own editors, there's something really nice about the process of working within your own tool. I've used my own text editor(it's call Left) for nearly 10 years, it took time to get it just right, but I iterated over the years(using Left to edit Left) but that time I spent putting it together is paid back 20x by the joy it gives me opening it and working in it in the morning.

I'd do it all over again if I had to.