Ah! Now I know who you are having seen that other account around many times!
I do not include the pictures because I like folks focusing on the words I write... but I totally get it.
I never thought of it as 'nostalgia therapy' but I have been re-watching as many television series from my childhood as I can over the previous year... to kind of see what I noticed... and maybe how the shows had influenced me. Long story short I have found it to be super helpful!
I think going back and taking another look at television from childhood is helpful on many levels. During my childhood, and I am assuming yours too, we weren't constantly inundated with novelty. I grew up in the 90s so, there were certainly plenty of shows competing for attention but, not to the extent of media bombardment we have now with social media. I feel that it is good for our nervous systems to go back to "our roots" as far as media goes, slow down and ponder what was so formative. It is definitely interesting to re-read or re-watch and see what I notice also. For example I am re-reading the Lord of the Rings which I first read as a teenager and it is pretty much a different story from what I grasped back then.
The shows that I watched were mainly from the fifties to the eighties and by the nineties I had thoroughly tuned out. I feel rather blessed being born into Gen-X and realizing from an early age that all forms of media were some kind of programming.
I had really high hopes for social media but once the advertisers, politicians and celebrities got involved things went downhill fast. Nowadays it sure is quite the 'bombardment' (as you stated) and the younger generations seem to lack the 'mental firewall' required to filter out the noise.
Ha! I often re-watch shows (not just ones from my childhood) and re-read books. I have done it for an incredibly long time now and do it not just because I love the stories but because it shows me how I have changed in my thinking and/or attitude.
I think that I only re-read the Lord of the rings series two (or maybe three) times but I re-read the Wheel of Time series around six times now... and The Dark Tower series nine or ten times now. I started to re-read the latter a tenth time (last year) but fizzled out on it.