If you want a warm wetsuit try a 7mm freediving suit. They are skin-in (raw neoprene inside) and the rubber becomes a second skin. Freediving suits don’t have any zippers and require suit lube to get in. They are a two piece beaver tail style with an attached hood, some have pants cut off at the chest and some have 3 mil shoulder straps.
It sounds like a pain with suit lube, but it’s really not. The suits slide right on and there’s no tugging and pulling. I warm up my spray bottle of suit lube so on a chilly morning it’s nice to get into. Also the suit never smells because the skin-in dries quickly and holds no moisture to mildew. Plus the suit lube made from hair conditioner and water smells nice.
Other than that you could order a custom from JMJ wetsuits in Torrance, CA. They make two piece attached hood suits out of really good neoprene which you can choose. Just like In-n-Out Burger they have options that aren’t on the menu, like commercial suits out of 9mm, special kevlar padding if you need it, etc.
Attached hood is the key because the neck is always a leak point along with zippers. That’s why no zipper attached hood wetsuits are the warmest option.
A really good wetsuit is great.
@MAKO Spearguns has great freediving suits.
Seals Water Sports in Santa Rosa has some Omer freediving suits on sale right now.
I can tell you that most standard off the rack scuba suits sold in dive shops these days suck.
That’s what most of these people who go dry have experience with, and so in their minds all wetsuits suck. I personally like the very low maintenance trouble free nature of wetsuits. I also enjoy having salt water on my skin and being wet in the ocean.