Thanks for the contributions to this discussion.
I presently own a Dell Vostro 1500 (3 y old I believe ?). I also had an Inspiron 6400 which I gave tp my girlfrend.
Both are terrible
in terms of CPU/fan accessibility (not as bad as my 8 years old ECS iBuddie... but still). I mean... having to remove the LCD, keyboard, hard Drive, DVD player, etc. to access the CPU is ridiculous. It's around 40min of work to disassemble it when you're not a pro, and then the same amount of time to do whatever needs to be done and put everything back (if you're not unlucky). Not to mention the research that needs to e done beforehand + all these plastic parts that get more and more fragile as they are popped in & out every single time you take your machine apart.
The problem is that the CPU cooling system in the Vostro gathers so much dust that it's almost unavoidable to not take it apart at least once a year (once every 6 months is preferable...)
This morning I've seen a few pictures of incredibly easy to disassemble older Acer. A few screws and you can replace most parts all at once.
Anyway, here are a few other interesting links I found this morning :The upgradable, recyclable Bloom laptop concept
-- Yes, Interesting.... But that's about it.
More interresting maybe, as it compares different "styles" of laptops (business, gamer, consumer...) : Taking Apart Your Laptop
... From this article, it seems like gaming laptops are the easiest and most user-friendly notebooks to upgrade/disassemble.
Finally... HP seems to get into that game