Personally I dont think it's screens. ADHD and autism existed long before screens did.....also whoever pointed out people with ADHD apparently have no issues focusing on screens-you do know we also experience HYPER FOCUS as well right? So the ADHD brain actually does have the capacity to hyperfoucs, especially if it's something that gives a nice rush of dopamine (which shirt form media certainly does-its the instant gratification feeling). Obv back before that existed it could have been books or certain topics etc.
I do agree that life is certainly, louder, brighter and busier than it used to be. Personally I've ended up having to get Loop ear plugs as the sensory overload got so bad I couldn't function at least with them it cuts out the background noise which helps with the overstimulation and being able to concentrate a bit better.
I wouldn't say it was easier in the 90s. In fact I'll straight out say as a woman it was 100x harder, simply because the only kind of ADHD/autism that existed was based entirely on the symptoms boys presented as a really the only studies ever done on either were very very heavily generally based and essentially just based on how boys behaved.
And even then, looking back I can clearly remember the kids who did have the outwardly disruptive behaviour but it was always just out down to bad behaviour (which now with more understanding of ND conditions would be recognised as symptoms). But the for the majority of girls there was basically a tiny tiny chance anyone would even have cotemplated them being ND, especially as for one, a lot of girls with autism became very very good as masking (more so than boys) and also a hell of a lot of girls were displaying symptoms of predominantly INATTENTIVE ADHD either without the hyperactivity, or as we now understand with the hyperactivity mainly being confined to their brains (you know having a brain that NEVER EVER STOPS). they didn't even know back then that there as more than one type (now broken down into Predominantly Hyperactive, Predominantly Inattentive or if you're lucky like me you get the joy of the Combined type 🫠)
There is a huge genetic component to Austin and ADHD (and also other conditions like dyslexia/dyspraxia) which is why you end up seeing families with more than one kid who has it (and when you dig a bit deeper usually realise either one of both parents have symptoms) . In fact I think that's why so many women in their 30s (who have kids that are being diagnosed because we test and recognise it more) often have a lightbulb moment doing their kids being assessed where they realise "holy shit....this is me...this is how I've thought and behaved all my life that I just assumed was normal" and that can be what prompts then to be assessed themselves.
I disagree wholly that ADHD is being overdiagnosed and anyone who disagreed I strongly suggest you read both parts 1 and part 2 of the NHS England commissioned ADHD taskforce to learn the ACTUAL facts and statistics.
Part 1: NHS England » Report of the independent ADHD Taskforce: Part 1 https://share.google/oMzTl7Z1skO9Eh5FD
Part 2: NHS England » Report of the independent ADHD Taskforce: Part 2 https://share.google/UGl3yKwjlpzZUyGZ2
Also for ADHD medication (which actually is one of the most studied and reached and also classed as one as the most effective medications given it helps the majority of those who take it) you NEED to have an diagnosis to access it. And it's honestly certainly for me changed my life for the better. I said earlier that for me the "hyperactivity" is mostly in my brain-well is till vividly remember ten first day I took my mediction-my brain was quiet. I mean...silent. peaceful. For the first time in my entire life it was calm. Suddenly things which I had spent my whole life struggling with, became easier to do. I liken it to playing your entire life in hard mode and then realising that with meds you're now playing it in normal mode. Its not a cure, but a good tool to help you cope better and function better.