100% agree. And in addition to being less wasteful, repairability and upgradeability are much more pro-consumer as well.
SMARTPHONES
And what would you like to “upgrade” on your phone by yourself? Install new camera, and some RAM and upgrade hard drive ?

If you want to have a phone with a sturdy feeling, the unibody is much better. Unibody makes it more difficult to remove battery, change parts.
The main point of smartphone “repair ability” is, that almost nobody will do it the self at home, as the components are too small and the whole process it extremely fiddly.
The few, who will, will do it anyway (just for a challenge) and probably screw something up in the process and than take it to store to repair it.
COMPUTER TOWERS
Computers are different. You can be “eco friendly” by throwing out the whole inside of the computer and put newer things inside. The old internals go to the dumpster, keeping the chassis, and maybe power source. Then you buy all new motherboard, new ram (if standard changes by then) new CPU and GPU, new everything, from all those eco friendly computer components makers, who do not harm environment whatsoever.
You have done it, you have saved the planet.
LAPTOPS IN A OVERSIMPLIFIED STATEMENT
- Casuals: buy the cheapest (last the shortest time)
- Enthusiasts: buy the maxed out (change only once dead)
- PROs: buy maxed out every few years (doesn’t matter it still runs as a whistle, just write it off and get a new one)
And, yes, the RANT BONUS
I have a real answer to environment improvement. From now on the GreenPeace shall use only pencil and recycled paper for writing their reports. They must lead the way