The short answer is that I'm quite familiar with those, but I felt the post I'd made was getting alarmingly long already, and I did decide to try and reduce some of the "10k word epics" I'm prone to writing. This probably should have been split into multiple posts, but I struggled to find anything I found relevant to cut. And, yes, figuring out the structure of it was a challenge, because I know a lot of people won't read to the end, so... consider it my best attempt.
I probably should have mentioned CRI and R9 in particular, as those are quite relevant, and a lot of the cheaper LEDs perform very poorly on R9. But I also ran into a limit of the affordable spectrometer I was using being more focused on the blues (it's designed for a 400-580nm main range) than the reds, so I wasn't too comfortable using the data from it to make strong claims about the reds. I'd need a meter that reads either (a) far wider range or (b) more focused on the 600+nm range to make those claims, and I don't have one. While I don't mind spending money for blog post data, I'm also not willing to drop many thousands on a post. Sorry!
I'll pick up some of those Tradfri LEDs, and the "bedtimebulb" ones as well to poke and prod - I've been looking for "good LEDs," and I'm finding stuff that's at least decent looking and has a spectrum plot in the datasheet, but it's at $30/bulb. YujiLED has some stuff that looks good on paper, but... also $35/bulb shipped in small quantities, at which point it's a somewhat hard sell over just using incandescents.
I really do appreciate the feedback, especially on ordering - it's something I struggled with throughout writing this post, and I won't say I'm entirely happy with what I stuck out there, but neither did I find a lot of ways to radically improve it, without moving towards "another book of a blog post."
You say people aren't going to give up their screens, though - but I know people, myself included, who are doing exactly that after the sun goes down, to great sleep benefits. I really do notice the difference.
But as far as actionable measures... I did put those in there. Incandescents, on dimmers, in evening spaces. I have yet to convince myself that even high CRI, high R9 LEDs are low enough in blue to not interfere with human sleep. The ones I've used don't dim very well at all, and certainly not as deeply as incandescent bulbs do.