I don't believe these are "missed opportunities". A true missed opportunity would be, say, Microsoft and the phone market. The train came and went on that because of the network effects of a phone platform putting momentum behind incumbents.
Look at Apple Music. Spotify was released in 2008. Google Play Music All Access in 2013. Apple Music was released in 2015. For being technically 8 years late, APM has 50M subscribers, compared to Spotify's 75M [1] (GPM is probably harder to measure because the subscription is combined with YTP/YTM, I pay for it but literally never use it). If that wasn't impressive, realize that APM is marketed just to Apple users, whereas all those other platforms do everything they can to get users on every platform (APM is available on Windows and Android, though I'd love to see the user counts for those platforms over the competition, likely very low).
Apple Maps and the routers are really weird things to pick on. They're not core at all to Apple's business model. They're fungible products; you can use any mapping software or any router and get 98% of the same experience. Apple simply doesn't invest a lot in fungible products; they invest in products where they can make a true 10x difference for their customers. iCloud Drive is the same way; customers want it so they'll make it, but they're not going to drop $5B developing it.
An Apple TV subscription service is more similar to APM than anything else, with the exception that music streaming services are expected to have "everything" on the platform whereas streaming services just need to host those handful of shows you watch to justify the subscription price. And they might have a great lineup coming up the pipeline here; they've ordered shows from Ronald Moore, a TV adaptation of Foundation, a comedy from the co-creators of Its Always Sunny, a show produced by J.J. Abrams, etc; I think they're in a good place to drop a big announcement and secure a LOT of subscribers. [2]
[1] https://www.forbes.com/sites/careypurcell/2018/05/15/with-50...
[2] https://appleinsider.com/articles/18/07/11/here-are-all-of-t...