Anyone can have an Apple Account whether or not they own an Apple Device.
In this case, too, you can create Invites on icloud.com on non-Apple devices. Including the webpage seems nicely responsive and can probably make them in an Android Chrome tab if you wanted.
The only remaining obstacle is that it isn't a free feature of an Apple Account, but requires an iCloud+ subscription. But that's useful for Apple Music and Apple TV+ and other products, too, many of which work just fine on non-Apple devices as well.
A company creating a useful tool that encourages people to buy their product is incredibly boring, typical, and not at all controversial until it's Apple doing it.
I suspect it has a lot more to do with the concentration of mobile devs and FOSS types here, along with people who really can't understand that not everyone wants their phone to be something other than "Working out of the box."
Ah yes the classic false dichotomy, that it either has to be closed/proprietary/locked down and "just works" or it can be open but unusable. In reality the two are completely orthogonal. There's nothing magical about publishing the source that suddenly changes the code or the product and breaks it. If Apple open sourced ever line of code they have tonight, would iPhones suddenly stop working?
So, what's stopping you from becoming Apple's competition? If a significant number of people crave your idea of FOSS and you have ideas to make a superior product, I'm sure the market will reward you.
Did you ever see any Linux laptop in a store? They do have some market share but never existed to the ordinary people.
Also, GNU/Linux phones exist (Librem 5 is my daily driver). However without Apple's budgets, you can't create the same smooth experience. You just can't compete with the duopoly.
So what you're saying is that alternatives do exist, but they aren't popular... that doesn't sound like a "duopoly" exists, it just sounds like Android and Apple cover the needs of the vast majority of people. I'm sure it's difficult to be part of a niche, but that doesn't mean that there's some conspiracy against you.
> I'm sure it's difficult to be part of a niche, but that doesn't mean that there's some conspiracy against you.
Yes, it does: https://puri.sm/posts/breaking-ground/. Purism tried to created their own smartphone not relying on Apple and Google and it was almost impossible to find the necessary chips. Nobody wanted to share the schematics or open the drivers. People are just locked-in into the duopoly. It's impossible to use popular apps without it, like Whatsapp or even Signal (!).
I think that's preferable to them being totally unable to RSVP but you're still going to be the friend that can't make the invite. It's comparable to iMessage. You can still talk to Android users but it's a notably worse experience.
Non-Apple users cant contribute to the playlist. No mention on the impact to the shared photo album. If its just a normal shared Photos.app album, non-apple users are locked out there, too.