Sounds like someone is regurgitating Apple's marketing speech.
How do you define "Most advanced"? because, for me, an OS that you can't use to run apps because Apple's servers were down is anything but advanced to me.
> It is by far the most advanced operating system which serves newbies and professionals alike. I know people who use it to browse Facebook and use Messages/Music/Safari etc and those who use it to manage servers, build apps, and more.
Advanced according to what metric exactly? And your second sentence can be said about Windows or any modern OS really.
It's true many problems end up being solved, but you don't see a problem shipping broken software on which millions depend to work?
I started using macOS back on Panther and I don't trust Apple to ship a reliable update anymore. I'm still on Mojave because even today Catalina is broken for a lot of people.
I've been running Big Sur since it went into public beta. There were a few issues, VPNs were disabled for a bit, they didn't load the SMB drivers, a few of my apps had to release updates (Karabiner, Bartender), but otherwise everything works.