If your butter goes off in a butter dish at room temperature faster than you use it, just put half a block out and keep the rest in the fridge.
We buy softer pure butter (Kerrygold, M&S own brand or Loseley Summer Meadow) in winter and any old normal butter when it stays soft of it's own accord.
No need for any kind of nasty spreads and I think they might now be starting to admit that saturated animal fat is not as bad for the heart or arteries as has been claimed in recently decades.
Seems that the French Paradox might not have been a paradox after all.
I don't think that artificial sweeteners are good because they taste disgusting and encourage a sweet tooth and dependency on sweet tastes.
I don't routinely drink any sort of fizzy pop and drink mainly unsweetened tea, coffee, water, wine or gin and tonic occasionally. Probably have a couple of litres of 'fizzy' a year if that and that is almost all tonic in gin.
I would apply the Grandmother test to anyone's Grandmother, eg one from the Mediteranean, Asia, or anywhere with a better food culture than post war Britain.