I, too, went through like 18 months in the UK with the big stores not selling any until one reintroduced it recently. Alternatives on the internet were like 3+x the price, at least. It was incredibly frustrating. I now stock up and have 2-3 boxes of the stuff, in case it does vanish again.

Doubly frustrating since mine is a small, single-drawer dishwasher, so pods are even worse since I can't break them down. It leads to me having way too much detergent in the dishwasher and I end up with residue on the dishes.