For the ATPL exams you will still need to use a CRP-5, no electronic flight computers or programmable calculators. I think this is so you actually have some idea what the wind drift means rather than just putting numbers into a machine.
Actually, this serves to separate the real men from the sheep, which is the objective of the European study process.
In particular, the use of the non-wind side of the slide rule as a multiply/divide calculator (which, BTW, I can do, having used a slide rule for real at school in the 1960s) is nothing more than a throwback to the 19th century.
The Americans dumped the circular slide rule (as a mandatory thing) years ago. An awful decision, because the whole of the USA is now covered with aircraft wreckage.