I can't imagine why it is not taught now, especially as the PPL course is almost double the hours.
If the clubs don't have spinnable aircraft its their problem - it shouldn't be a reason for not teaching spinning.
I know several pilots who found stalls in a PA28 and turns at 45 AOB a major issue - including one person who nearly quit the PPL rather than do steep turns - and compulsory spinning would have scared most of them away for good. People on PPL courses are the bread and butter for flying schools, so they're not going to scare the punters if they can help it.