People use both.
But yet, for some, instead of contributing to a discussion, the thing to do is act a the grammar police.
Got it.
“It may not pass the editorial process but it is not uncommon for you to encounter the use of for all intensive purposes both in speech and in print.”
‘For all intents and purposes vs. for all intensive purposes’
https://www.englishgrammar.org/intents-purposes-intensive-purposes/
Don’t get stuck on stupid; we have enough of it in this current world, kthx.
Your sense of humor is broken. Enjoy your day.