Another important area is codecs used for wireless transmission in relatively near fields, things like Bluetooth headsets, headphones, etc.
When it comes to streaming media, or even download media, low-delay is important, but even with quality aspects in mind, current codecs aren't really saturating most of what we'd consider bandwidth limitation. I think we'll only see relatively minute changes to that in the forthcoming years.
When it comes to archiving and when quality is the prime aspect, even when we're talking about downloads and/or streaming, there isn't really much of a reason not to just go lossless. Listening to lossless music on a phone through crappy earbuds (those that came with the phone, etc.) while on a bus or train commute, might not be a very sensible application of lossless media. But for that we have Opus and (HE-) AAC which are fine. And when you're at home and you need to stream music from a media server to a nice DAC, there's pretty much no reason to not go for lossless. Fast local networks are so cheap these days, that even streaming uncompressed audio isn't likely to saturate your network. Not only that, but lossless has gained so much hardware acceptance in the last couple years (or is it already decades?), that there's little argument for not using lossless.
As networks get faster and cheaper, simplex audio transfer is gonna edge more towards lossless, while duplex audio is gonna be more and more going for low delay.
Space constraint are almost never the issue really. Even cloud storage is cheap enough, that people can store entire lossless audio libraries for next to nothing - let alone a 1TB hard drive.
The only exception where I see this, is perhaps things like audio books. An audio book is for instance around 10h of audio, so that'll add up if you want to keep the audio book on a mobile device etc. However, this is also an application of primarily speech codecs, etc. so what I've written at the top is also kinda true for those.
When it comes to just keeping music, stereo or however many channels you want, more people are gonna demand lossless downloads, or rip to lossless, and just keep it as that. There's not much reason to go for anything else.