My advice.... not worth anything... is to skip the multi coat ablatives... use a harder paint and pay a diver to ablate your paint ;-)... you can frequent inspections as well. Ablative paints only ablate if the boat is moving and they are not fouled with slime. I predict they will leave the market for a number of reasons.
Hard paint doesn't come off even with aggressive scraping by a diver. It does build up over time - more than people might realize. We blasted 10yrs of hard paint off our boat and lost 400lbs and started using ablative paint. Now, the ablative is mostly gone by the time it needs repainting every 2-3yrs, and for what it is left, we just tell the powerwasher guy to go to town on it and it quickly disappears.
I don't think ablatives are going anywhere soon - they are the most popular type of paint, and large ships use them.
You may be thinking about the old type of ablative, which is like talcum soft (I think they actually added talcum to the paint). The newer ablatives - the past decade or so - are chemically controlled release types, which actually dissolve in the water slowly over time. So even standing still, they are slowly ablating.
Paint weight is insidious and creeps up on you. For example, Trinidad SR - one of the more popular hard paints - weighs 25lbs/gal and is 85% solids by weight. So each gallon adds 21lbs to the boat. This means we add 100lbs each time we paint - and that weight never comes off!
After removing 400lbs of bottom paint once, if we had stuck with hard paint again, we would now be 500lbs heavier. For us, that is 1/2" of waterline - which means we would have to use more paint to raise the waterline, which would sink us further over time. It would be spiraling down a rabbit hole and eventually lead again to an expensive bottom blast job.
I'm all for ablative!