It shouldn’t as long as you make sure that the numeric uid/gid of your user account matches the one from the original system. If that’s not feasible then you can chown the tree.

I thought that slock was too complicated so I wrote a tiny one for myself in Go using xgb. Less than 100 lines and pretty straightforward but it makes some assumption about my personal setup so not public.

Not worried at all, I’ve moved on many years ago.

EXWM. I am a longtime Emacs user so merging the concepts of Emacs buffers and X windows is a huge benefit. Only one set of keybindings to worry about, all of my Emacs window management stuff works for X windows too. One less external dependency to worry about too. In a new environment (like when starting a new job etc) as long as I have my Emacs config I am good to go.