That sux ...
When these Big shows are set up to be exclusive, so you have to have each service just to see what you use to have with Cable/Sat ...
Its gonna be REALLY EXPENSIVE when all is done.
As I posted above, new seasons of Dr. Who, Luther, and other BBC America shows will still air on linear broadcast. It's just the streaming rights for past seasons are moving to another service. This sort of thing has been going on since Hulu and Amazon Prime started building up their catalog years ago, poaching broadcast and cable network TV shows from Netflix. Nothing new. Just more services to pay for if you need access to past seasons of every series airing on linear broadcast, and even then, you can simply alternate services month to month.
Catching all the Netfilx, Hulu, CBS All Access, Disney+, etc. originals is another story. But again, nothing new when you consider the various premium cable channels have been producing high-quality originals going on two-plus decades.
Pay for what you want to watch when you want to watch it — truly whenever you want to watch it, if you can wait for each full season to finish airing before subscribing.
By the way, when new seasons of linear broadcast shows do end up on streaming services, it's usually because they are being saved from cancellation by that service.