This actually wrong way to do it, here the pro way:
1.Start writing a game/app/engine/os.
2.Write dozen utility packages for it.
3.Write high-level packages for #2
4.Write a "light-weight" version of #3 when disgusted with bloat of #3.
5.repeat #2 with more modern rust code.
I find them obnoxius, just like inserting animated gifs and meme responses. If used in serious context it makes the whole post look cringe, using them to replace words is fit only for smartphone troglodytes sending character-limited posts/SMS.