Errrr, think I might get shot down for this....
Why the big concerns over never using a wizz-wheel after PPL?
I haven't used mine since a few weeks after I passed the GFT, after all a few judicious uses of the 1 in 60 rule and you've got all the wind correction angle/headwind info you need in real life.
As for all the other gubbins on it:
- TAS v IAS: be serious! VFR in the UK, you rarely get above 3k anyway, so near enough the same.
- ability to multiply and divide: I can! Worst comes to the worst and use a proper calculator.
- density altitude: again, not an issue in the UK unless you are going into some real small fields on very hot days. I don't because these are are marginal conditions and I like living.
And yes, I'm sure the wheel would be more accurate than my rough calculations but given that we never actually know what the winds are going to be down to the last knot, then it's irrelevant.
As for the thought of trying to use one in the air, no chance! More important things to do like aviating, navigating and communicating!
[edited for speeling]