While I'm not
positive (maybe he'll return and post a yes/no), I seem to recall that Pepper's source code was bought by a guy named Jason Slack, presumably the fellow you're responding to. It was my first editor when I went back to OS X myself, although I confess I grew irritated both with it and with the attitude of its (original, pre-Jason) developer, who always seemed to have a chip on his shoulder about, well, everything: performance issues on OS X with Pepper that other editors didn't exhibit were Apple's fault; Pepper's mediocre documentation wasn't really a problem, users just weren't exploring the editor to find things (maybe this was a complaint in the Pe days, but I swear it was a real complaint); ultimately, Pepper's failure in the marketplace wasn't due to the poor performance, bugs and mediocre documentation, but our collective failure to recognize its true genius.
...sorry, apparently I've wanted to get that off my chest for 15 years. I'm feeling better now!
Anyway, I was kind of hopeful Pepper would be revived, but I gave up on it long ago, moving from BBEdit to TextMate to Sublime Text and, perhaps surprisingly, back to BBEdit, although I keep Atom up to date as well.