Nostalgia is something completely different, this is the buzz you get opening something new that you're excited about.
It's been a long time since I've had that feeling about anything, that's why I try different things looking for it.
I agree that I would love to feel the excitement over a new computer.
The Amiga came at a time in the market where a bunch of elements made it possible. That time in the computer industry is well behind us. Even if we found an awesome group of tech folks with vision and even backing to product something truly revolutionary computer it wouldn't take over the market or even compete.
The industry has matured and is dominated by players that have the application base to solve problems. The computer market isn't expanding like it was in the 80's.
I'm grateful that I was part of the Amiga in the day with an active user group and many friends enjoyed them. When I bought my 3000D it felt very special and a great sense of pride knowing it's capabilities were beyond apple and microsoft.
My way of feeling part of it, is to still use my classics today. I have good fun to purchase add on's and tweak them here and there... They were such a great computer they still can be used very productively today. It is nice to see my family use them and appreciate the applications written for it.
I do enjoy MOS greatly and it feels like where the Amiga would have evolved to in time (imho), it is the modern Amiga for my usages. It doesn't get me excited adding to the boxes, it is more of a tool... Need to play a RTG game really fast? Need to browse the web? Need to manipulate pictures? Need to connect to work? ...Use MOS... If not then I'm on the classics.