For those losing weight for more than 3 months, did you take a break or are you planning to?

I’ve been seeing a lot of chatter on YouTube and Instagram from people saying it’s imperative to take a break after 12 weeks or you’ll wreck your metabolism or hurt your thyroid. This is the first I am hearing about this at all so I am curious if you have ever or are planning to take a break and eat at maintenance for a bit? If you didn’t, do you wish you did?

I have been at this for about 18 weeks and I’m definitely in a plateau, wondering if I should take a break. I don’t feel like I need to stamina-wise but I’m just wondering if I should I have about 15 lbs to go.