Same here, I extract brewed from 2008 - 2014 and I wish I had started out with all-grain. I also wish I had known about John Palmer's How to Brew when I first started. It was super valuable in helping me feel confident in all my basic process steps early onWish I'd dared to build the gear from Dave Lines books and get all grain brewing last century. Instead gave up malt extract brewing for 26 years, before jumping into all grain again.
What a lot of joy missed there.