I see the posts with all comments as replies, but it does take some navigation to see everything, like a twitter conversation. It's less intuitive than the nested comment layout but the content seems to be there.
What I'm really impressed by is being able to follow Lemmy communities from within Mastodon... e.g. by searching @[email protected] I can see threads and posts without leaving my Mastodon app of choice (Tusky). It's amazing how it just works.
Some might say that some Redditors have always been revolting!
Yes, I also finished this recently. I keep thinking about it and have managed to apply the 'just let it go' thing a few times. It really helps me reset my mood and stop overthinking stuff. Paraphrasing part of the book I think Singer writes something like 'if you apply this method then you'll truly have no problems for the rest of your life' and I think as crazy as that sounds, he's not wrong. Doesn't make it easy, but as he puts it, 'opening my heart' definitely works for me.
I may be more receptive than some to this kind of advice (due to exposure and a lot of what I consider personal growth—I used to be much more Cartesian in my thinking), but I'd recommend the book to most people regardless.