vincennes1
If you feel lonely - understandable if you live alone - would you consider joining local interest groups / clubs / organisations, etc?
You're far more likely to make friends this way than relying on random people who happen to live in the same street.
Everyone has their own lives, and we're all different. Some like to socialise with neighbours, others don't - for various reasons. And I don't think this has changed much over the years except that some people are perhaps more busy than they would've been many, many years ago when, for example, it wasn't unusual for women to be at home whilst their husbands were out at work. Now often the women are out at work, too. And retirement is a different kettle of fish to what it was in bygone years also. Some retirees start a whole new life when they retire, taking on voluntary work, hobbies, etc, as opposed to pottering around at home and in the garden. If anything, I think we are more 'structured' now in our lifestyles and some, like me, have to be if we have caring responsibilities. I personally wouldn't have the time to socialise with my neighbours even if I wanted to because what little 'down time' I have, I use to relax, catch up with family and friends, read, or even enjoy doing nothing at all.
And there's no guarantee that you'd even particularly like your neighbours if you got to know them, nor have anything in common with them, except living in the same street. At least if you join an interest group, you will be mixing with like-minded people, and some will be local to you.