Amazon Prime is available in 17 major nations, so not the whole world, but with much of the USA, Canada, UK, Europe, China, Mexico, and India and 9 more countries, it is in a large part of the whole world.
Its funny. I've been a customer of Amazon for almost 24 years - Originally, I had to CALL Amazon, on a landline telephone, to use my credit card to order books, back in the 90's..
Prior to Amazon, I used to drive, 90 miles, to larger urban areas, once or twice a month, to shop at large chain bookstores that were absent in my smaller community, until Amazon showed up.
I found I loved persuing Amazon's old used antique book offerings. Now they are like a huge Sears store. Think of the opportunity Sears Roebuck's management missed.
I purchased a used book for my wife that was printed in 1879, almost 140 years ago, via Amazon that I could never have found locally, probably even statewide.
Yet, I never became an owner of its equities. Too much debt, no earnings, yada yada yada. Show how limited my understanding was of internet commerce. 🙁
Prior to Amazon mail order purchasing, it would take 7-14 days for me to receive mail order goods, if I was lucky.
Amazon gets goods to me in 24-48 hours routinely, prior to the pandemic.
Even during the pandemic, most things show up pretty quickly if they are even available at all.
Just think, perhaps Mr Bezos is stepping down to facilitate Amazon dleivery, via Blue Origin, on the moon or Mars - so that Amazon is there to greet Elon when he arrives on Mars. 😃