I would rather recommend ignoring people who automatically follow every latest fad without much thought, especially to those who dare call themselves “engineers”. Learn both and make an informed decision. The new shiny thing is not better just because it is new and shiny, especially when it's just an abstraction over the old thing.

Not too long ago people who refused to be dragged into the blockchain circus were called luddites by some. Now no-one even remembers that, the industry has moved on to another buzzword du jour. Not every change for the sake of change is “progress”, there are more dead-ends that lead nowhere than things that stick with us for a long time.

Also: old men make the world go brrr, it's not an insult as you seem to think it is. I wonder what the Linux kernel folk would say to your insinuations, if they had time to waste here. Or the OpenBSD guys who are much more conservative still.

And yet, here you are, not ignoring people who are apparently fad-followers!

jj is not new, nor a fad. And, moreover, its not "just" an abstraction - you would know this if you actually read my comment. jj is built on top of git and incorporates concepts from mercurial and elsewhere. There's ample writing in the github readme, docs and lots of thoughtful essays and manuals created about jj. But becoming informed is clearly not something you have much interest in.

Most laughable is that you seemingly created this account JUST to make this comment.

Thanks for providing a perfect example of the most common detractors of jj

you do you, friend