I've gotten close to this point before in my life, especially when OS 1 was still the only OS available last year, but my playbook got new life since OS 2 and I've upgraded without any problems (that many have/had) since I had my playbook.
I've recently updated to 2.1.840 (Beta) and everything works as should
I was also one of the first people to acquire one in South Africa before release date (got to love when you know where to look).
But my recent job relocation is situated right almost in the middle of now where (Lanseria International Airport). It used to be a small charter airport but has grown into bigger one but its still limited in communication on this side of the world. There is wifi service through some public wifi, but its very slow and usually dies out in the afternoons due to too much traffic on the radio links.
I barely have BIS service on my BlackBerry (9380 full touch) and cellular reception is also at a minimum on most cellular services.
I've started to notice that since I started working here and not running around like a headless chicken and needing to be mobile all the time like I did at my previous location (O.R Tambo International Airport).
Current fuel costs and moving expenses is also adding to my decision at the moment since driving to work and back is killing me and moving will be the best option in the long run.
So it with a sad heart that I'll have to part with this sweet little device, but unfortunately it's just sitting in its bag and not being used now. I'm not much of a gamer, so I rarely play games on it (I'm not able to buy any games that are of interest to me since my credit card don't work for overseas purchases and I don't have a paypal account, so I'm stuck in a rut on acquiring new applications for it as well at the moment. Who knows, maybe the future I'll acquire a 4LTE playbook (once we have proper LTE service in South Africa) and by that time BB10 will be out. But I'll probably go for the phone with BB10 rather than the tablet (since it fits my mobile needs more).