I visited on ESTA countless times since 2021. November 2021, Jan 2022, May 2022, June/July 2022, August 2022, November 2022, February 2023.
November 21 and Jan 22 were pre-K1 application. May and June were after submitting i129f. Aug 22-Feb 23 were all 2-3 month trips. All of the prior trips were a week or two.
All week or two trips were no trouble going through and visiting.
November 2022, the officer didn't ask me a single question. He just took my passport and took my picture. He seemed to be doing that to everyone. Not one question, not one word.
Feb 2023, I was threatened with being sent home by the officer and then got sent to secondary and the guy who let me in was a sweetheart.
Just be aware when going through on a long visit. You'll get a lecture most of the time but there's a good chance you'll get in. Be prepared for a secondary or being sent home.