Thank you for the write-up and suggestion.
My uneducated opinion is that the Lead-Acid battery market has gone very competitive, to the extreme of all batteries coming with superlatives in the name, but the same basic cost-cutting construction, as little lead as they can get by with and not have too many warranty returns. "Extreme" "Deep Cycle" "Commercial" "Everstart"? "Baloney"
The replacement Lithium battery market is not so mature, so they should be better. But we don't have much history on Lithium replacement batteries used in 12V car systems. We've seen what can go wrong with first-generation Leaf Lithium batteries in hot climates. I'd hope that these replacement Lithium batteries are more mature, but we just don't have the history. If we're paying 2X the price of a lead-acid battery for a Lithium battery, it would be nice to hear of people who have >4 years of trouble-free service from them. It could be that some people are selling perfect batteries and others are selling batteries that are not appropriate for long-term use in our cars. We just don't have the data yet.
Again, this is just one person's opinion.