In the last 30 years more and more countries introduced graphing calculators and then CAS systems to their high-school students. But are there already any examples of a trend in the opposite direction? That is, examples where a state or country decided to row back and deemphasize or discontinue the use of CAS systems or graphical calculators in teaching mathematics (at the secondary level). If so, what were the (official) reasons for this decision?
Please note that I don't want to discuss advantages or disadvantages of CAS systems in high school math, but just the very specific question above.
An example of this phenomenon I am aware of is in a state of Germany, more specifically Baden Württemberg: from 2004 on at every Gymnasium [a type of high-school] graphical calculators were allowed (e.g. TI-83/84) in the final examination (Abitur) in one part of the exam. Yet, it has been decided that from the Abitur 2019 on only a simple scientific calculator will be allowed. Since this tool will not be allowed in the Abitur it changes the style of teaching. CAS tools or software like geogebra will be used from time to time on a PC/tablet/smartphone but most of the time, calculations will be done manually as well as in tests.