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They still get way better gas mileage. They also don’t cost $15,000 when the battery goes bad. I replaced my 12 year old prius battery myself in like two hours after buying a brand new $2,900 replacement from the Toyota dealership. Could have just bought and replaced the bad cell in it, but in a 12 year old battery I’d probably have another to replace within a year and just have to keep going in and replacing one after the other, which would be a pain.
What? No they aren’t. They almost always fail on a curve of power and voltage loss.
Also, I didn’t look it up, but I’d be very surprised if the model Y tesla didn’t require (suggest and oem?) an AGM battery. It’s still lead, but due to how they’re made they can’t get a dead short in them like older regular lead acid batteries can once they get old, although it still isn’t very common for it to happen.