The trouble with Cash ISAs

With the tax year having just ticked over, I figured that now was a good time to say something about Individual Savings Accounts (ISAs), and in particular what I perceive to be the trouble with cash ISAs.

I used to be a big fan of cash ISAs, having opened my first one over a decade ago when Smile bank was offering a mouth-watering 7.25% (if memory serves me correctly). It served me well for a while, until I discovered...