my main opinion is just that simple pass phrases ala: https://xkcd.com/936/ can be brute forced with an english dictionary which is super predictable. tossing in leet speak or a caesar cipher or almost anything else is unpredictable enough to make that risk pretty low unless the attacker knows you are using it.
that's very common, widely understood and easy to replicate, i.e., not that great
make up your own 1337 5p33k with 3 characters changed
I simply become the zodiac and convert my pass phrase to a cipher
I mean it's better than pig latin lol
my main opinion is just that simple pass phrases ala: https://xkcd.com/936/ can be brute forced with an english dictionary which is super predictable. tossing in leet speak or a caesar cipher or almost anything else is unpredictable enough to make that risk pretty low unless the attacker knows you are using it.