When I was a child I used to love Tizer, but I tried some recently and it was awful -
I am firmly of the opinion that apart from the inevitable when our pallet veers towards the bitter in old age, that modern concoctions have been made sweeter than 50/60 years ago. The relative cost of sugar is one reason. And "sweeteners" are cheaper still, some come from sugar refining so are a waste product with value. Sweeteners have a different taste, which affects the overall appeal (or otherwise). One reason I won't touch Bulmers cider, which amazingly has resulted in 20 years of relative freedom from headaches.

I am told by those wot tried Cadbury's cream eggs they are now made in eastern Europe and are sweeter and sickly as a result.
As an aside cheap Polo mints were, at one time, coming from the Phillipines and had that non-mint taste you get from TicTacs (yuk). I have noticed Polo have realised it was going to be a PR disaster. Just like when Coca0Cola changed the sweetener without telling anyone and for a while, Pepsi became No.1.

Sickly Angel delight is still sold, Instant Whip - where is that? Even as a kid I preferred the Whip - oooer.