I had a client ask about an old iCloud storage plan, recently. She’s still on the grandfather’s plan for $10.99/year that provides 20GB. That was probably enough for advanced users back when Apple introduced iCloud storage in 2011. Today 50GB is for most users at $1/month and the next level for $3/month is 200GB. Few users with an iPhone can get by with the 5GB plan anymore.
You can view details of Apple’s current iCloud plans here: https://support.apple.com/en-us/HT201058
Did you know that iCloud (as of 2011) relies on Amazon Web Services and Microsoft Azure? I wonder if that’s still the case. I doubt they widely document how their systems work, but as much as we think we’re choosing one service over another…where our data is stored isn’t exactly clear to the end-user. The Wikipedia page even says that “In 2016, Apple signed a deal with Google to use Google Cloud Platform for some iCloud services.” Interesting.