Guys,
You can always do both and simply reap the most benefits of both as they may (or may not) best serve you. Doesn't need to be exclusively one or the other.
Also, streaming is not only limited to services like NetFlix, et al that rotate content in/out of access. There are those like iTunes and Vudu (and a few other lesser ones) that offer you perpetual licenses to own individual movies or TV seasons/series much more like owning discs. Access to those generally don't just disappear on you at the whim of big corporate like the way they would on NetFlix, et al. Sure, if Apple or their iTunes business dies, you might lose access then... but that's an extremely unlikely scenario and would probably portend bigger problems to worry about... Still, there's nothing stopping one from owning discs for the most important content and (streaming) digital (licenses) for the less important (or more marginal or blindbuy) content typically more cheaply (or just for additional convenience on top of owning discs... especially since many disc releases do include digital copies) or whatever other blend/mix in between -- I typically only pay $3-5 for digitals on sale at iTunes, and they usually give free upgrades to 4K if they ever eventually get those from the studios...
There are also some streaming services like the Criterion Channel you might find very worthwhile for the niche they target too. CC and maybe Disney+ are the 2 services I feel most worthwhile keeping year-round... and Criterion actually gives (annual?) charter(?) subscribers a (stackable) $10 GC every now and then (roughly 2-3x a year) to use in their recurring flash sales -- not sure if they offer those GCs to non-charter members or those who don't do annual subscriptions though. I find there are plenty of titles I'd like to watch on CC but not necessarily own (or at least risk a blindbuy anyway), particularly at Criteron's prices (although CC actually rotates quite a lot of catalog titles not released by Criterion on disc too). And in their case, I'd think subscribing helps sustain them so that they can continue to release discs as well...
_Man_
You can always do both and simply reap the most benefits of both as they may (or may not) best serve you. Doesn't need to be exclusively one or the other.
Also, streaming is not only limited to services like NetFlix, et al that rotate content in/out of access. There are those like iTunes and Vudu (and a few other lesser ones) that offer you perpetual licenses to own individual movies or TV seasons/series much more like owning discs. Access to those generally don't just disappear on you at the whim of big corporate like the way they would on NetFlix, et al. Sure, if Apple or their iTunes business dies, you might lose access then... but that's an extremely unlikely scenario and would probably portend bigger problems to worry about... Still, there's nothing stopping one from owning discs for the most important content and (streaming) digital (licenses) for the less important (or more marginal or blindbuy) content typically more cheaply (or just for additional convenience on top of owning discs... especially since many disc releases do include digital copies) or whatever other blend/mix in between -- I typically only pay $3-5 for digitals on sale at iTunes, and they usually give free upgrades to 4K if they ever eventually get those from the studios...
There are also some streaming services like the Criterion Channel you might find very worthwhile for the niche they target too. CC and maybe Disney+ are the 2 services I feel most worthwhile keeping year-round... and Criterion actually gives (annual?) charter(?) subscribers a (stackable) $10 GC every now and then (roughly 2-3x a year) to use in their recurring flash sales -- not sure if they offer those GCs to non-charter members or those who don't do annual subscriptions though. I find there are plenty of titles I'd like to watch on CC but not necessarily own (or at least risk a blindbuy anyway), particularly at Criteron's prices (although CC actually rotates quite a lot of catalog titles not released by Criterion on disc too). And in their case, I'd think subscribing helps sustain them so that they can continue to release discs as well...
_Man_