Youngsters these days.

I resisted streaming for a long time. I think the technical issues have now been resolved to the point streaming should be indistinguishable from other physical digital media, or maybe better. I had a few CDs that skipped, but they ripped just fine.
I get the idea of enjoying the collection you have, but I hope I never when get to the point of no longer being interested in discovering something new. I also didn’t manage to buy every album I ever wanted to listen to. With streaming I can go back and hear albums I barely remember or completely missed. I’m so glad I’m no longer stagnant. I listen to my system more than I had in years.
Sometimes “Ok, boomer” is the appropriate dismissive phrase for an old dog that has no interest in learning a new trick, unable to see the obvious benefit because they think they already know it all. Your grandson was trying to help you.
“Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young.”

My two boys are 23 and 18. The older one is in grad school and listens to an amazing array of music. I guess I started the fire and he has fanned the flames on his own. We turn each other on to new to us music on a regular basis. He had my old Kenwood amp and AR14 speakers in undergrad but the ARs were too big to fit in the Prius on the way out west so I bought him a pair of Quads when he got there - he is still rocking the Kenwood. That means his younger brother is getting the ARs for high school graduation along with a new Yamaha amp. He has recently found Pink Floyd and his tastes are really developing quickly - he’ll be teaching me new tricks soon. 
My point is that I see folks on here belittling their generation and it really pisses me off. Sure there are plenty of youngsters out there that don’t have much substance to them but that was true in my day too - look at all the folks that ruined my high school experience with disco. The fact is these kids will lead us out of our current mess. 
Regarding streaming - I am a huge fan. I have a gazillion CDs and hundreds of records. I still enjoy vinyl very much. But the amount of new music I’ve been introduced and reintroduced to through streaming is incredible. Bob Dylan has jumped out of my Mytek Manhatten and is currently standing in my room. 
From my vantage point The Kids are Alright. YMMV. 

+1 cat_doorman

When I was 45, I came to realize that the most annoying thing in the world is a 30 year old man...the 2nd most annoying thing is a 25 yr old man. It's true. As creative director for a creative agency, I also know these young people are fearsome and really wonderful to work with. 

It may not seem so, but I think the OP actually imprinted a lot on his grandson.  Young people listen to us older folks quite a bit.  It's just not so apparent at the moment...but it creeps in later. 

I'm fairly young (38) and I love my LP collection. My father turned me onto vinyl as a kid and in the last few years he has got us both back into playing and collecting. At this point I have a considerable amount of money wrapped up in my turntable and my record collection.

That said,  I also have a streamer and a nice DAC and I have subscriptions to Tidal and Qobuz. I recently got my father (65) into streaming as well after months of attempting to talk him into it. He initially had all the same reasons mentioned by so many others from his generation as to why he didn't need a streaming service. After one weekend of playing his his new bluesound node 2I and setting up trials for Qobuz and Tidal guess what? He absolutley loves it.

It is not about replacing our media collections or even stopping the purchase of new media. It's a way to discover new music and artists. It's a way to fill in the gaps in our collections. It is a way to find the next album you want to buy or hear an album you had forgotten about until something made it pop back up again.

My father and I live several states apart and we can send links to eachother recommending new music or sharing play lists. Dismissing streaming platforms entirely is just like my my grandfather telling my father his rock music in the 70s was just noise. But you guys are probably right, it doesn't have any value, just the youth of today embracing a throw-away culture...