So basically app developers should build low bandwidth apps - that would be a win for high bandwidth users too. Everything transfers massive amounts of data exhausting even gigabit fibre fast.
There anre also environments that are high-speed but high-cost or capped gb/month.
I like how I can tell an iPhone that a wifi AP is a “low bandwidth” one so it holds off on many tasks. But you can screw yourself over if you tether a computer, even a Mac.
I’ve found recently that TripMode keeps forgetting the apps I’ve blocked. Haven’t done any investigation, but it’s disconcerting when I check the list and find that iCloud is once again enabled.