Earlier quoted context omitted.
> apps which were replaced by a successor Hello, Omnigraffle. I bought this on iPad, used this something like, three times before having a need to use it over a year later and "Sorry! There is a new version to buy and your version is no longer supported, or runs!". It wasn't cheap, as apps go. Never, ever buying anything from Omni, ever again. Edit: To add details, I bought this for £35 on iOS 7. When iOS 8 came arou…
Similar with Tweetbot, which seems to release a new version as a separate app every couple years or so? The version I reluctantly bought (knowing they do this) is no longer updated but had long-standing bugs even when it was being actively developed. The experience makes me reluctant to buy any apps at all on App Store, tbh.
It's one of the most polished apps around. You don't owe the Developer's time indefinitely from one $5 purchase, and you're free to move to an alternative. I'm happy to continue to support the apps I love -- they generally aren't asking a whole lot.
Additionally, in the case of Twitter clients, they also can't add a lot of new customers b/c Twitter has capped their allowed clients. If they didn't charge customers again, they wouldn't be able to sustain the work with new ones.