I started at MS during Vista and I've been involved (sometimes tangentially) with Windows ever since. This is all my opinion, but It's been very interesting seeing the decision making process change over time. If I had to summarize the change, I'd say that it's evolved from an expertise-based system to a data based system. The reason why eight people were present at every planning meeting is because their expert opin…
I am not sure this is correct. Telemetry can show what users do but it won't show why they do it. Users don't click the button: maybe they don't need it but maybe they don't understand what it does. Or maybe there are too many buttons and users get lost.
Also making a decision based on telemetry is making a desicion based on opinion of non-experts. There is a quote by Ford “If I had asked people what they wanted, they would have said faster horses.”. Can you make something innovative this way?
For example if we take a code editor like Sublime Text which in my opinion has very good UI, and it has no toolbar - can you use telemetry as an argument for removing a toolbar? No, because if there is a toolbar, there will be users who would use it without realising that they could do better without it. You need an expert to make better UI, not telemetry.