I don't write journals. But....
We have gone from spendypants to semi-mustachian (still work in progress to go full-mustachian).
We used to spend > $1500/month eating out + > $1000 in groceries. This was for 4 people.
This year (2020), it has been < $400 in groceries per month + < $500 in eating out for the whole year so far.
So yes, I can confirm it is possible :-D.