It's been a slow changeover since 2022 when they lost a trademark dispute with another company that owned the name "Juanita's" trademark and also made Mexican food.

The website even got updated with the new name, which is a mashup of the names of the original Juanita and her husband Antonio. I personally love the new name, I think it's sweet.

https://www.wweek.com/restaurants/cheap-eats/2022/12/31/juanitas-chips-now-sold-nationwideas-juantonios/

https://www.juantoniossnacks.com/

Sasser, one of the founders of Untitled Goose Game publisher Panic, followed up with the answer in a few days, via a post from The Trademark Lawyer: California-based Juanita’s Foods, a maker and distributor of canned Mexican food products, had filed suit in federal court this August against Juanita’s chips parent company Dominguez Family Foods, alleging it was violating the terms of an agreement to use “Juanita’s” only on products sold in the Pacific Northwest (defined as Alaska, Idaho, Montana, Nevada, Oregon, Washington and Wyoming).

“Plaintiff could have filed a trademark infringement lawsuit and shut down Dominguez” in the late 1980s, the lawsuit claims. “Instead, Plaintiff gave Dominguez the benefit of the doubt. It offered Dominguez an opportunity to continue using the Juanita’s mark, subject to very specific restrictions that were intended to avoid any consumer confusion between their brands.”

That part I was unaware of. Can you provide evidence for this, because a quick search only surfaces that they were sued for not actually including natural lime flavor in the "hint of lime" chips. They were extensively referred to as "tortilla chips" in those articles. I have yet to find anything saying that they don't meet the legal definition of "tortilla chip."

EDIT:

They're still described as tortilla chips, just not on the front of the bag. The ingredients are literally just corn, oil, salt, and added flavoring on the flavored ones. I don't know how that "doesn't meet the legal definition."

It's like when you see a "cheese product". It is kinda cheese. So these are kinda tortilla chips I bet.

I swear that happened with another company

It happened to a number of companies. Flip Phone, Laundromat, Trampoline, Escalator... all used to be protected names.

Not exactly, that is a thing but it would be kind of the opposite of this. Let's say a company was the first to ever make tortilla chips, and tortilla was the brand name. Then other companies started making something like tortilla chips with a different name, but then the name tortilla became so common that the first company lost its trademark so then everybody could call them tortilla chips.

I say "the thin and crispy tortilla chips" and Tostitos is the company that makes those so they get my money.

People are allowed to like things, you know.