There are an awful lot of near hysterical statements on these forums. Please, be constructive in your comments and if you have problems, tell us what the problem is in detail and provide:
a. Your system specs
b. Have you modified the sim
c. What location have you installed the sim - I would always advise not to install it in the Windows drive
d. How did you install the update? using the Store?
e. How fast / reliable is your internet? This will impact how succesfull your downloads are and also the quality of the terrain - over the last few days, I am sure the servers have been under stress which resulted in poor terrain depiction.
From reading all of the comments, many have modified / tweaked and then had problems or they are trying to run it on too high a setting, go with the recommnended settings initially and then compromise.
Also try going into window mode and changing the size of your sim window - you can then run at higher settings if you wish to.
If you want to know how hard your system is working, enable developer mode in settings and display FPS - this will also tell you where your bottlenecks are - play with window size and setting until you get an FPS that suits you.
This sim appears to need a day or so to settle down. I updated without an issue (I installled in my D Drive), I rebooted as I always do, ran the sim and on my first flight the views started doing there own thing and then I had a CTD.
Today, I loaded up, couple of circuits at my local airfield, no problems (high/ultra settings with live traffic and weather). I then loaded up the Japan Tour and flew for 2.5 hours - no CTD, beautiful scenery and my only issue was the FPS degraded over time - this has been a long-term bug for me.
Keep things in perspective - this is a project with enormous scope that will us great pleasure for many years. It will probably take a year to get all of the elements working as we would hope, if a company does not make money on a project - the project dies and our hopes with it. I intend to support this fantastic sim, I will buy content and I will try and provide constructive feedback and help the community.
Thank you Microsoft and ASOBO for bringing Flight Simulator back to life and working hard to give us a great product (and no, I don’t work for either company!!)