Reality exists despite the best of guesswork. I have never torn down a dead AGM and found plates thicker than around .045". Plates do shed over time.
Do lithium batteries automatically come with cell to cell management systems? And user interfaces that allow real time monitoring?
And it is quite important to understand that charging to 95% SOC rapidly is much better than to go to 100% over several days time.
A 40 amp Megawatt adjusted to 14.4 volts can take over when a perverter cannot reach and maintain 14.4 volts at home. Plug in at night and set the alarm for the next day.