Siloed, yes. Have the problems you mentioned, no. On top of that there's the issue of at least some of the tech that open source likes to use. Prime example is

Siloed, yes. Have the problems you mentioned, no. On top of that there's the issue of at least some of the tech that open source likes to use. Prime example is XMPP which 10 years after introduction of the iPhone still didn't have a compelling mobile story [1] 10 more years later, and yeah. I think the lack of open source messengers is a combination of many things and whatever Apple forced is just a part of it. [1] https://gultsch.de/xmpp_2016.html https://gultsch.de/xmpp_2016.html In 2016 almost all XEPs references where in early experimental stages.