What have personal pensions learned from ISAs?

Until this year's Budget, when it came to tax-incentivised saving schemes, personal pensions were often portrayed as the bad apple. Issues such as failed esoteric investments, pension liberation and ongoing negative legislative changes, such as the reduction in lifetime allowance, all contributed. On the other hand, ISAs since their introduction in April 1999 appear to be unblemished. So are there any lessons to be learned? Take the issue of investments that can be held. ISAs have a permitted investment list, which over recent years has been expanded to include the likes of Alterna...