Average lifespan of a Macbook Pro Retina ?

Question

I am just wondering what would be the average lifespan of daily use , wear and tear on a Macbook Pro Retina ? I have known macs to be the most durable things on the planet. I have just purchased a referbished october 2013 13" i5 , 8GB RAM , Iris Graphics … (no nvidia option for the 13" was looking for small size mac packed with power, then limited to my money stash) , 512 GB SSD storage model to replace my 2012 i3 Lenovo laptop that has 1GB nVidia graphics 8GB RAM,500GB storage , which would be given to my parents for Christmas, because they are needing a new computer, and my late 2008 2GHz Intel Macbook, that had been upgraded to 8GB RAM, which i flashed its firmware, since the RAM was somehow maxing out at 4GB… but now uses the full 8GB, to a friend as a gift at the  art studio I work in.
I do a variety of artwork , ranging from drawing in manga studio to photoshop and some 3D manipulation, modelling and rendering, creating music, to editing film, which may include rendering 3D character animations. I am wondering if I am going to max out this little beast, or it would follow the average lifespan of a Macbook ? Then if I consider upgrading it in the future to 16GB RAM, looks like I would have to update the entire logic board, since the RAM is soldered on, do the apple stores compensate for this option that is provide logic board upgrades ? What if they change the design of logic boards in the future ? Extra storage is not a problem, because I can always get a bigger external drive, and SD cards are becoming more capable in storing more stuff..

Answer 1

Here is information on my upgrade from my previous work machine… which is a pc to the mac… as I also had/have a late 2008 macbook, which was actually good bait lol, was impressed by how it ran for an 2008 model of a computer..
1)Lenovo Think Pad/idea pad (21/10/2011 - release date)
£800
Intel i3 CPU 2 cores/4 threads. 2.3 GHz
Intel Intel® HD Graphics 3000 +
Nvidia GeForce GT 520M
RAM 8GB
Storage 500 GB (normal hard drive)
Heavy to carry with bad back from home and to the studio and back.
New Machine:
2)Apple Macbook Pro
£1099
(xx/10/2013 -release date)
Intel i5 CPU 2 cores/4 threads. 2.6 GHz
Intel® Iris™ Graphics 5100
RAM 8GB
Storage 512GB flash storage (SSD)
lighter than late 2008 Macbook and easier to carry...
The two old machines are still running and looked after them well, and giving them away as gifts… to those who don't have computers. I always worked with them on a desk surface, so they would not overheat when rendering still 3D artworks and animations, so it should last on average life span then...