Linux from Scratch with Training Wheels
I don’t know why but I find this so interesting.  I totally don’t have time right now (with a young kid and trying to make some/any progress in my career as a dev now that I’ve successfully made the career change to working as a developer), but I really just like understanding how things work from the ground up - I can’t wait to have the time to build my own Linux distribution.  It feels like it’ll be such a waste of time - like installing 5 or 6 different distros on an old PC I had just out of curiosity to see what they looked snd felt like.  And I broke and fixed the boot loader so many times that it became kind of an enjoyable challenge getting the machine to work again - “ok, now how did I get grub2 to recognise where my partitions are…?”  It seemed like spinning my wheels but I just really enjoyed it.  I don’t know why.  Kind of reminds me of a comment someone made here on HN about Linux a while ago - something to the effect of “I want an OS I do t want a hobby.”  Except I enjoy messing around with it and spending time making it work.  Not very productive though I admit.