you would be as entitled to continue using it and your in-app purchases if EA moved to the Epic store as you are today
Incorrect, I would need to have an account on the Epic store in order to continue using it or to re-install it. You are making some assumptions here that I am not sure will play out.
As TikTok users found out this week (and no, they weren't the first nor will they be the last), Apple providing some kind of "ownership protection" of your app is a foolish assumption to make.
That was not my point. Certainly apps can be abandoned, discontinued or banned, etc.
My point was that I should not be forced to sign up, and thereby give my personal and payment information to another company to continue to use something I already own. At the very least I should be able to maintain my previous purchases from the same store I bought them from originally.
One example in particular that has always been troublesome is mobile clients to certain warehouse management systems that I implement and support. The app version has to stay aligned with the server version of the WMS. There have been numerous instances where I have had a client complain that their mobile scanner stopped working because the app was auto-updated and was thrown out of alignment with the server.
Fair enough, but that seems a very specialized case. I am not a fan of employers wanting folks to have work apps installed on their personal devices. Wouldn't a company issued device, with updates centrally controlled, fix this? I am a bit out of the loop with how iOS devices can or cannot be controlled centrally by an employer.
I see a lot of folks that have had things like Whatsapp "forced" upon them by an employer. In the alt-store world that person now needs to have a Meta Store account, even if they don't want or use any other Meta services. Granted, no one should fall for this or be coerced in this manner but it happens every day. Teams is another great example.
As is already the case in the PC and Mac world, it is likely that exactly two kinds of apps will be "forced" onto alternate app stores - content/streaming services and games.
Agreed, games and content/streaming services will almost certainly leave the app store. Games will leave for the likes of Steam, Epic, Nintendo or perhaps new players. Content/Streaming services will leave for their own sites.
I think you might be underestimating the rest however. The likes of Meta services will likely bail as well as they will no longer be held to the privacy scorecard requirements. Actually I see almost every major brand, from Starbucks to your health insurance app leaving for their own sites for just that reason, privacy, or the lack thereof as well as driving traffic to their own web site versus the app store.
As is already the case in the PC and Mac world
Personally, I would love it if the Mac world was just like the iOS world in terms of the app store. Everything in one place = #chefskiss