Battery Tesla or OEM Hyundai

For context, I have a first generation Tesla Model S - 2014. It has 215,000-ish miles on it. The battery capacity has gone down by about 10-12%. It still runs and drives like a dream. It's on the original battery.

I've never had any reason to regret my decision in the past 15 months of ownership, and I absolutely love driving it.

As an owner of a 2016 model S (bought new) with 228k miles on it, still on original battery with a range reduction of less than 15% compared to new.

Just replaced mine in my model 3, it lasted about 4.5 years before I get the alert on my app. Had it replaced in less than 20 minutes via mobile service in the app (there was already a tech in the area).

I had a 12v battery give me a low voltage warning and they just came around and changed it.

It's a Tesla thing.

Tesla doesn't keep a buffer zone at the top end of the battery. 100% means 100% in a Tesla. Tesla advises to only use 100% when you need the extra range.

2018 M3P with 54K and it is right at 7%

My 2019 M3 with 50K miles says 288 miles today (310 original) but it has been far lower at times (255 miles) and bounces around.

My I6 battery died after 4mo and 2200km (1370mi). Car is sitting at the dealership awaiting warranty decision.

I went to an official dealership and they told me the battery is faulty, and replacing it would cost around 185 euro, labor included. I checked online and it seemed like in the Netherlands a comparable battery costs between 85 and 120 euro.